Home / 7,410.30-11,115.45-7,118.70

Finding the Fourth Proportional to 7,410.30, 11,115.45 and 7,118.70

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Solution

The fourth proportional to 7,410.30, 11,115.45 and 7,118.70 is: 10,678.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,410.30 : 11,115.45 = 7,118.70 : x
  2. Step 2: Convert to fraction form
    7,410.30/11,115.45 = 7,118.70/x
  3. Step 3: Cross multiply
    7,410.30x = 11,115.45 × 7,118.70
  4. Step 4: Simplify right side
    7,410.30x = 79,127,553.92
  5. Step 5: Solve for x
    x = 79,127,553.92/7,410.30
  6. Step 6: Final answer
    x = 10,678.05

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Half scale
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Double scale
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Similar ratio
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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.