Home / 5,679.20-8,516.12-2,118.90

Finding the Fourth Proportional to 5,679.20, 8,516.12 and 2,118.90

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Solution

The fourth proportional to 5,679.20, 8,516.12 and 2,118.90 is: 3,177.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.20 : 8,516.12 = 2,118.90 : x
  2. Step 2: Convert to fraction form
    5,679.20/8,516.12 = 2,118.90/x
  3. Step 3: Cross multiply
    5,679.20x = 8,516.12 × 2,118.90
  4. Step 4: Simplify right side
    5,679.20x = 18,044,806.67
  5. Step 5: Solve for x
    x = 18,044,806.67/5,679.20
  6. Step 6: Final answer
    x = 3,177.35

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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.