Home / 5,139.26-7,708.89-1,243.66

Finding the Fourth Proportional to 5,139.26, 7,708.89 and 1,243.66

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Solution

The fourth proportional to 5,139.26, 7,708.89 and 1,243.66 is: 1,865.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.26 : 7,708.89 = 1,243.66 : x
  2. Step 2: Convert to fraction form
    5,139.26/7,708.89 = 1,243.66/x
  3. Step 3: Cross multiply
    5,139.26x = 7,708.89 × 1,243.66
  4. Step 4: Simplify right side
    5,139.26x = 9,587,238.14
  5. Step 5: Solve for x
    x = 9,587,238.14/5,139.26
  6. Step 6: Final answer
    x = 1,865.49

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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.