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Finding the Fourth Proportional to 38,658.70, 57,982.65 and 12,366.10

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Solution

The fourth proportional to 38,658.70, 57,982.65 and 12,366.10 is: 18,547.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,658.70 : 57,982.65 = 12,366.10 : x
  2. Step 2: Convert to fraction form
    38,658.70/57,982.65 = 12,366.10/x
  3. Step 3: Cross multiply
    38,658.70x = 57,982.65 × 12,366.10
  4. Step 4: Simplify right side
    38,658.70x = 717,019,248.17
  5. Step 5: Solve for x
    x = 717,019,248.17/38,658.70
  6. Step 6: Final answer
    x = 18,547.42

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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.