Home / 7,175.28-9,901.92-3,988.62

Finding the Fourth Proportional to 7,175.28, 9,901.92 and 3,988.62

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Solution

The fourth proportional to 7,175.28, 9,901.92 and 3,988.62 is: 5,504.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,175.28 : 9,901.92 = 3,988.62 : x
  2. Step 2: Convert to fraction form
    7,175.28/9,901.92 = 3,988.62/x
  3. Step 3: Cross multiply
    7,175.28x = 9,901.92 × 3,988.62
  4. Step 4: Simplify right side
    7,175.28x = 39,494,996.15
  5. Step 5: Solve for x
    x = 39,494,996.15/7,175.28
  6. Step 6: Final answer
    x = 5,504.31

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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.