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Finding the Fourth Proportional to 19,817.70, 29,726.55 and 8,712.60

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Solution

The fourth proportional to 19,817.70, 29,726.55 and 8,712.60 is: 13,068.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,817.70 : 29,726.55 = 8,712.60 : x
  2. Step 2: Convert to fraction form
    19,817.70/29,726.55 = 8,712.60/x
  3. Step 3: Cross multiply
    19,817.70x = 29,726.55 × 8,712.60
  4. Step 4: Simplify right side
    19,817.70x = 258,995,539.53
  5. Step 5: Solve for x
    x = 258,995,539.53/19,817.70
  6. Step 6: Final answer
    x = 13,068.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.