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Finding the Fourth Proportional to 7,175.01, 9,901.50 and 3,988.20

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Solution

The fourth proportional to 7,175.01, 9,901.50 and 3,988.20 is: 5,503.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,175.01 : 9,901.50 = 3,988.20 : x
  2. Step 2: Convert to fraction form
    7,175.01/9,901.50 = 3,988.20/x
  3. Step 3: Cross multiply
    7,175.01x = 9,901.50 × 3,988.20
  4. Step 4: Simplify right side
    7,175.01x = 39,489,162.30
  5. Step 5: Solve for x
    x = 39,489,162.30/7,175.01
  6. Step 6: Final answer
    x = 5,503.71

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1.5x scale

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.