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Finding the Fourth Proportional to 38,490.50, 57,740.70 and 10,788.50

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Solution

The fourth proportional to 38,490.50, 57,740.70 and 10,788.50 is: 16,184.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,490.50 : 57,740.70 = 10,788.50 : x
  2. Step 2: Convert to fraction form
    38,490.50/57,740.70 = 10,788.50/x
  3. Step 3: Cross multiply
    38,490.50x = 57,740.70 × 10,788.50
  4. Step 4: Simplify right side
    38,490.50x = 622,935,541.95
  5. Step 5: Solve for x
    x = 622,935,541.95/38,490.50
  6. Step 6: Final answer
    x = 16,184.14

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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.