Home / 8,959.28-12,379.68-6,449.72

Finding the Fourth Proportional to 8,959.28, 12,379.68 and 6,449.72

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Solution

The fourth proportional to 8,959.28, 12,379.68 and 6,449.72 is: 8,912.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.28 : 12,379.68 = 6,449.72 : x
  2. Step 2: Convert to fraction form
    8,959.28/12,379.68 = 6,449.72/x
  3. Step 3: Cross multiply
    8,959.28x = 12,379.68 × 6,449.72
  4. Step 4: Simplify right side
    8,959.28x = 79,845,407.79
  5. Step 5: Solve for x
    x = 79,845,407.79/8,959.28
  6. Step 6: Final answer
    x = 8,912.04

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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.