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Finding the Fourth Proportional to 14,145.74, 19,521.13 and 7,772.74

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Solution

The fourth proportional to 14,145.74, 19,521.13 and 7,772.74 is: 10,726.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,145.74 : 19,521.13 = 7,772.74 : x
  2. Step 2: Convert to fraction form
    14,145.74/19,521.13 = 7,772.74/x
  3. Step 3: Cross multiply
    14,145.74x = 19,521.13 × 7,772.74
  4. Step 4: Simplify right side
    14,145.74x = 151,732,531.53
  5. Step 5: Solve for x
    x = 151,732,531.53/14,145.74
  6. Step 6: Final answer
    x = 10,726.38

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Find fourth proportional to 7,072.87, 9,760.56 and 3,886.37
Half scale
Find fourth proportional to 28,291.47, 39,042.25 and 15,545.47
Double scale
Find fourth proportional to 14,146.74, 19,522.51 and 7,773.74
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.