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Finding the Fourth Proportional to 7,387.90, 11,081.85 and 7,067.95

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Solution

The fourth proportional to 7,387.90, 11,081.85 and 7,067.95 is: 10,601.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,387.90 : 11,081.85 = 7,067.95 : x
  2. Step 2: Convert to fraction form
    7,387.90/11,081.85 = 7,067.95/x
  3. Step 3: Cross multiply
    7,387.90x = 11,081.85 × 7,067.95
  4. Step 4: Simplify right side
    7,387.90x = 78,325,961.71
  5. Step 5: Solve for x
    x = 78,325,961.71/7,387.90
  6. Step 6: Final answer
    x = 10,601.93

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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.