Home / 8,319.28-11,479.92-5,131.68

Finding the Fourth Proportional to 8,319.28, 11,479.92 and 5,131.68

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Solution

The fourth proportional to 8,319.28, 11,479.92 and 5,131.68 is: 7,081.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.28 : 11,479.92 = 5,131.68 : x
  2. Step 2: Convert to fraction form
    8,319.28/11,479.92 = 5,131.68/x
  3. Step 3: Cross multiply
    8,319.28x = 11,479.92 × 5,131.68
  4. Step 4: Simplify right side
    8,319.28x = 58,911,275.87
  5. Step 5: Solve for x
    x = 58,911,275.87/8,319.28
  6. Step 6: Final answer
    x = 7,081.29

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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.