Home / 11,115.20-16,680.90-7,416.20

Finding the Fourth Proportional to 11,115.20, 16,680.90 and 7,416.20

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Solution

The fourth proportional to 11,115.20, 16,680.90 and 7,416.20 is: 11,129.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.20 : 16,680.90 = 7,416.20 : x
  2. Step 2: Convert to fraction form
    11,115.20/16,680.90 = 7,416.20/x
  3. Step 3: Cross multiply
    11,115.20x = 16,680.90 × 7,416.20
  4. Step 4: Simplify right side
    11,115.20x = 123,708,890.58
  5. Step 5: Solve for x
    x = 123,708,890.58/11,115.20
  6. Step 6: Final answer
    x = 11,129.70

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Double scale
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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.