Home / 31,121.58-42,948.29-16,974.42

Finding the Fourth Proportional to 31,121.58, 42,948.29 and 16,974.42

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Solution

The fourth proportional to 31,121.58, 42,948.29 and 16,974.42 is: 23,424.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.58 : 42,948.29 = 16,974.42 : x
  2. Step 2: Convert to fraction form
    31,121.58/42,948.29 = 16,974.42/x
  3. Step 3: Cross multiply
    31,121.58x = 42,948.29 × 16,974.42
  4. Step 4: Simplify right side
    31,121.58x = 729,022,387.97
  5. Step 5: Solve for x
    x = 729,022,387.97/31,121.58
  6. Step 6: Final answer
    x = 23,424.98

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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.