Home / 7,348.12-10,140.42-3,990.90

Finding the Fourth Proportional to 7,348.12, 10,140.42 and 3,990.90

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Solution

The fourth proportional to 7,348.12, 10,140.42 and 3,990.90 is: 5,507.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,348.12 : 10,140.42 = 3,990.90 : x
  2. Step 2: Convert to fraction form
    7,348.12/10,140.42 = 3,990.90/x
  3. Step 3: Cross multiply
    7,348.12x = 10,140.42 × 3,990.90
  4. Step 4: Simplify right side
    7,348.12x = 40,469,351.48
  5. Step 5: Solve for x
    x = 40,469,351.48/7,348.12
  6. Step 6: Final answer
    x = 5,507.44

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.