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Finding the Fourth Proportional to 38,920.88, 58,400.76 and 15,554

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Solution

The fourth proportional to 38,920.88, 58,400.76 and 15,554 is: 23,338.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,920.88 : 58,400.76 = 15,554 : x
  2. Step 2: Convert to fraction form
    38,920.88/58,400.76 = 15,554/x
  3. Step 3: Cross multiply
    38,920.88x = 58,400.76 × 15,554
  4. Step 4: Simplify right side
    38,920.88x = 908,365,421.04
  5. Step 5: Solve for x
    x = 908,365,421.04/38,920.88
  6. Step 6: Final answer
    x = 23,338.77

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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.