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Finding the Fourth Proportional to 15,061.70, 20,785.67 and 9,092.20

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Solution

The fourth proportional to 15,061.70, 20,785.67 and 9,092.20 is: 12,547.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.70 : 20,785.67 = 9,092.20 : x
  2. Step 2: Convert to fraction form
    15,061.70/20,785.67 = 9,092.20/x
  3. Step 3: Cross multiply
    15,061.70x = 20,785.67 × 9,092.20
  4. Step 4: Simplify right side
    15,061.70x = 188,987,439.54
  5. Step 5: Solve for x
    x = 188,987,439.54/15,061.70
  6. Step 6: Final answer
    x = 12,547.55

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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.