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Finding the Fourth Proportional to 18,472.88, 27,709.32 and 4,621.88

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Solution

The fourth proportional to 18,472.88, 27,709.32 and 4,621.88 is: 6,932.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,472.88 : 27,709.32 = 4,621.88 : x
  2. Step 2: Convert to fraction form
    18,472.88/27,709.32 = 4,621.88/x
  3. Step 3: Cross multiply
    18,472.88x = 27,709.32 × 4,621.88
  4. Step 4: Simplify right side
    18,472.88x = 128,069,013.38
  5. Step 5: Solve for x
    x = 128,069,013.38/18,472.88
  6. Step 6: Final answer
    x = 6,932.81

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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.