Home / 8,151.26-12,207.73-3,978.20

Finding the Fourth Proportional to 8,151.26, 12,207.73 and 3,978.20

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Solution

The fourth proportional to 8,151.26, 12,207.73 and 3,978.20 is: 5,957.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,151.26 : 12,207.73 = 3,978.20 : x
  2. Step 2: Convert to fraction form
    8,151.26/12,207.73 = 3,978.20/x
  3. Step 3: Cross multiply
    8,151.26x = 12,207.73 × 3,978.20
  4. Step 4: Simplify right side
    8,151.26x = 48,564,791.49
  5. Step 5: Solve for x
    x = 48,564,791.49/8,151.26
  6. Step 6: Final answer
    x = 5,957.95

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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.