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Finding the Fourth Proportional to 18,645.68, 25,731.15 and 10,147.88

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Solution

The fourth proportional to 18,645.68, 25,731.15 and 10,147.88 is: 14,004.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.68 : 25,731.15 = 10,147.88 : x
  2. Step 2: Convert to fraction form
    18,645.68/25,731.15 = 10,147.88/x
  3. Step 3: Cross multiply
    18,645.68x = 25,731.15 × 10,147.88
  4. Step 4: Simplify right side
    18,645.68x = 261,116,493.81
  5. Step 5: Solve for x
    x = 261,116,493.81/18,645.68
  6. Step 6: Final answer
    x = 14,004.13

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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.