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Finding the Fourth Proportional to 18,470.63, 27,712.33 and 10,139.99

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Solution

The fourth proportional to 18,470.63, 27,712.33 and 10,139.99 is: 15,213.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,470.63 : 27,712.33 = 10,139.99 : x
  2. Step 2: Convert to fraction form
    18,470.63/27,712.33 = 10,139.99/x
  3. Step 3: Cross multiply
    18,470.63x = 27,712.33 × 10,139.99
  4. Step 4: Simplify right side
    18,470.63x = 281,002,585.17
  5. Step 5: Solve for x
    x = 281,002,585.17/18,470.63
  6. Step 6: Final answer
    x = 15,213.48

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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.