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Finding the Fourth Proportional to 10,866.60, 14,996.90 and 6,388.11

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Solution

The fourth proportional to 10,866.60, 14,996.90 and 6,388.11 is: 8,816.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,866.60 : 14,996.90 = 6,388.11 : x
  2. Step 2: Convert to fraction form
    10,866.60/14,996.90 = 6,388.11/x
  3. Step 3: Cross multiply
    10,866.60x = 14,996.90 × 6,388.11
  4. Step 4: Simplify right side
    10,866.60x = 95,801,814.92
  5. Step 5: Solve for x
    x = 95,801,814.92/10,866.60
  6. Step 6: Final answer
    x = 8,816.17

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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.