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Finding the Fourth Proportional to 18,502.60, 27,709.76 and 10,687.72

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Solution

The fourth proportional to 18,502.60, 27,709.76 and 10,687.72 is: 16,006.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,502.60 : 27,709.76 = 10,687.72 : x
  2. Step 2: Convert to fraction form
    18,502.60/27,709.76 = 10,687.72/x
  3. Step 3: Cross multiply
    18,502.60x = 27,709.76 × 10,687.72
  4. Step 4: Simplify right side
    18,502.60x = 296,154,156.15
  5. Step 5: Solve for x
    x = 296,154,156.15/18,502.60
  6. Step 6: Final answer
    x = 16,006.08

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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.