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Finding the Fourth Proportional to 10,980.60, 16,470.90 and 6,606.60

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Solution

The fourth proportional to 10,980.60, 16,470.90 and 6,606.60 is: 9,909.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,980.60 : 16,470.90 = 6,606.60 : x
  2. Step 2: Convert to fraction form
    10,980.60/16,470.90 = 6,606.60/x
  3. Step 3: Cross multiply
    10,980.60x = 16,470.90 × 6,606.60
  4. Step 4: Simplify right side
    10,980.60x = 108,816,647.94
  5. Step 5: Solve for x
    x = 108,816,647.94/10,980.60
  6. Step 6: Final answer
    x = 9,909.90

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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.