Home / 31,139.12-42,972.24-16,992.20

Finding the Fourth Proportional to 31,139.12, 42,972.24 and 16,992.20

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Solution

The fourth proportional to 31,139.12, 42,972.24 and 16,992.20 is: 23,449.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,139.12 : 42,972.24 = 16,992.20 : x
  2. Step 2: Convert to fraction form
    31,139.12/42,972.24 = 16,992.20/x
  3. Step 3: Cross multiply
    31,139.12x = 42,972.24 × 16,992.20
  4. Step 4: Simplify right side
    31,139.12x = 730,192,896.53
  5. Step 5: Solve for x
    x = 730,192,896.53/31,139.12
  6. Step 6: Final answer
    x = 23,449.37

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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.