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Finding the Fourth Proportional to 38,398.70, 52,990.54 and 21,404.90

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Solution

The fourth proportional to 38,398.70, 52,990.54 and 21,404.90 is: 29,538.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,398.70 : 52,990.54 = 21,404.90 : x
  2. Step 2: Convert to fraction form
    38,398.70/52,990.54 = 21,404.90/x
  3. Step 3: Cross multiply
    38,398.70x = 52,990.54 × 21,404.90
  4. Step 4: Simplify right side
    38,398.70x = 1,134,257,209.65
  5. Step 5: Solve for x
    x = 1,134,257,209.65/38,398.70
  6. Step 6: Final answer
    x = 29,538.95

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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.