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Finding the Fourth Proportional to 12,486.71, 18,732.80 and 4,695.52

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Solution

The fourth proportional to 12,486.71, 18,732.80 and 4,695.52 is: 7,044.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.71 : 18,732.80 = 4,695.52 : x
  2. Step 2: Convert to fraction form
    12,486.71/18,732.80 = 4,695.52/x
  3. Step 3: Cross multiply
    12,486.71x = 18,732.80 × 4,695.52
  4. Step 4: Simplify right side
    12,486.71x = 87,960,119.91
  5. Step 5: Solve for x
    x = 87,960,119.91/12,486.71
  6. Step 6: Final answer
    x = 7,044.30

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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.