Home / 5,139.32-7,708.91-1,243.69

Finding the Fourth Proportional to 5,139.32, 7,708.91 and 1,243.69

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Solution

The fourth proportional to 5,139.32, 7,708.91 and 1,243.69 is: 1,865.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.32 : 7,708.91 = 1,243.69 : x
  2. Step 2: Convert to fraction form
    5,139.32/7,708.91 = 1,243.69/x
  3. Step 3: Cross multiply
    5,139.32x = 7,708.91 × 1,243.69
  4. Step 4: Simplify right side
    5,139.32x = 9,587,468.79
  5. Step 5: Solve for x
    x = 9,587,468.79/5,139.32
  6. Step 6: Final answer
    x = 1,865.51

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Double scale
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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.