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Finding the Fourth Proportional to 38,898.40, 58,304.40 and 21,380.80

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Solution

The fourth proportional to 38,898.40, 58,304.40 and 21,380.80 is: 32,047.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,898.40 : 58,304.40 = 21,380.80 : x
  2. Step 2: Convert to fraction form
    38,898.40/58,304.40 = 21,380.80/x
  3. Step 3: Cross multiply
    38,898.40x = 58,304.40 × 21,380.80
  4. Step 4: Simplify right side
    38,898.40x = 1,246,594,715.52
  5. Step 5: Solve for x
    x = 1,246,594,715.52/38,898.40
  6. Step 6: Final answer
    x = 32,047.45

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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.