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Finding the Fourth Proportional to 10,866.96, 14,996.46 and 6,390.90

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Solution

The fourth proportional to 10,866.96, 14,996.46 and 6,390.90 is: 8,819.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,866.96 : 14,996.46 = 6,390.90 : x
  2. Step 2: Convert to fraction form
    10,866.96/14,996.46 = 6,390.90/x
  3. Step 3: Cross multiply
    10,866.96x = 14,996.46 × 6,390.90
  4. Step 4: Simplify right side
    10,866.96x = 95,840,876.21
  5. Step 5: Solve for x
    x = 95,840,876.21/10,866.96
  6. Step 6: Final answer
    x = 8,819.47

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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.