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Finding the Fourth Proportional to 15,055.19, 20,775.89 and 8,340.80

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Solution

The fourth proportional to 15,055.19, 20,775.89 and 8,340.80 is: 11,510.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,055.19 : 20,775.89 = 8,340.80 : x
  2. Step 2: Convert to fraction form
    15,055.19/20,775.89 = 8,340.80/x
  3. Step 3: Cross multiply
    15,055.19x = 20,775.89 × 8,340.80
  4. Step 4: Simplify right side
    15,055.19x = 173,287,518.72
  5. Step 5: Solve for x
    x = 173,287,518.72/15,055.19
  6. Step 6: Final answer
    x = 11,510.15

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Half scale
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Double scale
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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.