Home / 10,081.10-15,121.65-5,149.10

Finding the Fourth Proportional to 10,081.10, 15,121.65 and 5,149.10

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Solution

The fourth proportional to 10,081.10, 15,121.65 and 5,149.10 is: 7,723.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,081.10 : 15,121.65 = 5,149.10 : x
  2. Step 2: Convert to fraction form
    10,081.10/15,121.65 = 5,149.10/x
  3. Step 3: Cross multiply
    10,081.10x = 15,121.65 × 5,149.10
  4. Step 4: Simplify right side
    10,081.10x = 77,862,888.02
  5. Step 5: Solve for x
    x = 77,862,888.02/10,081.10
  6. Step 6: Final answer
    x = 7,723.65

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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.