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Finding the Fourth Proportional to 11,132.80, 16,666.80 and 9,966.40

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Solution

The fourth proportional to 11,132.80, 16,666.80 and 9,966.40 is: 14,920.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,132.80 : 16,666.80 = 9,966.40 : x
  2. Step 2: Convert to fraction form
    11,132.80/16,666.80 = 9,966.40/x
  3. Step 3: Cross multiply
    11,132.80x = 16,666.80 × 9,966.40
  4. Step 4: Simplify right side
    11,132.80x = 166,107,995.52
  5. Step 5: Solve for x
    x = 166,107,995.52/11,132.80
  6. Step 6: Final answer
    x = 14,920.59

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1.5x scale

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.