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Finding the Fourth Proportional to 5,479.68, 8,213.76 and 2,881.92

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Solution

The fourth proportional to 5,479.68, 8,213.76 and 2,881.92 is: 4,319.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.68 : 8,213.76 = 2,881.92 : x
  2. Step 2: Convert to fraction form
    5,479.68/8,213.76 = 2,881.92/x
  3. Step 3: Cross multiply
    5,479.68x = 8,213.76 × 2,881.92
  4. Step 4: Simplify right side
    5,479.68x = 23,671,399.22
  5. Step 5: Solve for x
    x = 23,671,399.22/5,479.68
  6. Step 6: Final answer
    x = 4,319.85

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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.