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Finding the Fourth Proportional to 38,998.80, 58,411.80 and 15,613.20

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Solution

The fourth proportional to 38,998.80, 58,411.80 and 15,613.20 is: 23,385.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,998.80 : 58,411.80 = 15,613.20 : x
  2. Step 2: Convert to fraction form
    38,998.80/58,411.80 = 15,613.20/x
  3. Step 3: Cross multiply
    38,998.80x = 58,411.80 × 15,613.20
  4. Step 4: Simplify right side
    38,998.80x = 911,995,115.76
  5. Step 5: Solve for x
    x = 911,995,115.76/38,998.80
  6. Step 6: Final answer
    x = 23,385.21

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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.