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Finding the Fourth Proportional to 38,531.80, 57,797.70 and 20,061.40

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Solution

The fourth proportional to 38,531.80, 57,797.70 and 20,061.40 is: 30,092.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,531.80 : 57,797.70 = 20,061.40 : x
  2. Step 2: Convert to fraction form
    38,531.80/57,797.70 = 20,061.40/x
  3. Step 3: Cross multiply
    38,531.80x = 57,797.70 × 20,061.40
  4. Step 4: Simplify right side
    38,531.80x = 1,159,502,778.78
  5. Step 5: Solve for x
    x = 1,159,502,778.78/38,531.80
  6. Step 6: Final answer
    x = 30,092.10

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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.