Home / 3,972.01-5,487.99-3,139.11

Finding the Fourth Proportional to 3,972.01, 5,487.99 and 3,139.11

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Solution

The fourth proportional to 3,972.01, 5,487.99 and 3,139.11 is: 4,337.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972.01 : 5,487.99 = 3,139.11 : x
  2. Step 2: Convert to fraction form
    3,972.01/5,487.99 = 3,139.11/x
  3. Step 3: Cross multiply
    3,972.01x = 5,487.99 × 3,139.11
  4. Step 4: Simplify right side
    3,972.01x = 17,227,388.59
  5. Step 5: Solve for x
    x = 17,227,388.59/3,972.01
  6. Step 6: Final answer
    x = 4,337.20

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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.