Home / 8,319.50-12,479.20-3,387.96

Finding the Fourth Proportional to 8,319.50, 12,479.20 and 3,387.96

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Solution

The fourth proportional to 8,319.50, 12,479.20 and 3,387.96 is: 5,081.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.50 : 12,479.20 = 3,387.96 : x
  2. Step 2: Convert to fraction form
    8,319.50/12,479.20 = 3,387.96/x
  3. Step 3: Cross multiply
    8,319.50x = 12,479.20 × 3,387.96
  4. Step 4: Simplify right side
    8,319.50x = 42,279,030.43
  5. Step 5: Solve for x
    x = 42,279,030.43/8,319.50
  6. Step 6: Final answer
    x = 5,081.92

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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.