Home / 5,385.80-8,079.66-2,221.47

Finding the Fourth Proportional to 5,385.80, 8,079.66 and 2,221.47

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Solution

The fourth proportional to 5,385.80, 8,079.66 and 2,221.47 is: 3,332.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.80 : 8,079.66 = 2,221.47 : x
  2. Step 2: Convert to fraction form
    5,385.80/8,079.66 = 2,221.47/x
  3. Step 3: Cross multiply
    5,385.80x = 8,079.66 × 2,221.47
  4. Step 4: Simplify right side
    5,385.80x = 17,948,722.30
  5. Step 5: Solve for x
    x = 17,948,722.30/5,385.80
  6. Step 6: Final answer
    x = 3,332.60

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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.