Home / 31,121.24-42,947.89-16,974.59

Finding the Fourth Proportional to 31,121.24, 42,947.89 and 16,974.59

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Solution

The fourth proportional to 31,121.24, 42,947.89 and 16,974.59 is: 23,425.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.24 : 42,947.89 = 16,974.59 : x
  2. Step 2: Convert to fraction form
    31,121.24/42,947.89 = 16,974.59/x
  3. Step 3: Cross multiply
    31,121.24x = 42,947.89 × 16,974.59
  4. Step 4: Simplify right side
    31,121.24x = 729,022,566.94
  5. Step 5: Solve for x
    x = 729,022,566.94/31,121.24
  6. Step 6: Final answer
    x = 23,425.25

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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.