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Finding the Fourth Proportional to 7,101.75, 9,800.42 and 3,957.87

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Solution

The fourth proportional to 7,101.75, 9,800.42 and 3,957.87 is: 5,461.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,101.75 : 9,800.42 = 3,957.87 : x
  2. Step 2: Convert to fraction form
    7,101.75/9,800.42 = 3,957.87/x
  3. Step 3: Cross multiply
    7,101.75x = 9,800.42 × 3,957.87
  4. Step 4: Simplify right side
    7,101.75x = 38,788,768.52
  5. Step 5: Solve for x
    x = 38,788,768.52/7,101.75
  6. Step 6: Final answer
    x = 5,461.86

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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.