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Finding the Fourth Proportional to 10,866.10, 14,996.19 and 6,387.61

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Solution

The fourth proportional to 10,866.10, 14,996.19 and 6,387.61 is: 8,815.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,866.10 : 14,996.19 = 6,387.61 : x
  2. Step 2: Convert to fraction form
    10,866.10/14,996.19 = 6,387.61/x
  3. Step 3: Cross multiply
    10,866.10x = 14,996.19 × 6,387.61
  4. Step 4: Simplify right side
    10,866.10x = 95,789,813.21
  5. Step 5: Solve for x
    x = 95,789,813.21/10,866.10
  6. Step 6: Final answer
    x = 8,815.47

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1.5x scale

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.