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Finding the Fourth Proportional to 8,665.38, 12,985.65 and 4,773.06

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Solution

The fourth proportional to 8,665.38, 12,985.65 and 4,773.06 is: 7,152.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.38 : 12,985.65 = 4,773.06 : x
  2. Step 2: Convert to fraction form
    8,665.38/12,985.65 = 4,773.06/x
  3. Step 3: Cross multiply
    8,665.38x = 12,985.65 × 4,773.06
  4. Step 4: Simplify right side
    8,665.38x = 61,981,286.59
  5. Step 5: Solve for x
    x = 61,981,286.59/8,665.38
  6. Step 6: Final answer
    x = 7,152.75

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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.