Home / 5,129.73-7,079.76-3,139.95

Finding the Fourth Proportional to 5,129.73, 7,079.76 and 3,139.95

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Solution

The fourth proportional to 5,129.73, 7,079.76 and 3,139.95 is: 4,333.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.73 : 7,079.76 = 3,139.95 : x
  2. Step 2: Convert to fraction form
    5,129.73/7,079.76 = 3,139.95/x
  3. Step 3: Cross multiply
    5,129.73x = 7,079.76 × 3,139.95
  4. Step 4: Simplify right side
    5,129.73x = 22,230,092.41
  5. Step 5: Solve for x
    x = 22,230,092.41/5,129.73
  6. Step 6: Final answer
    x = 4,333.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.