Home / 31,122.91-42,948.31-16,974.91

Finding the Fourth Proportional to 31,122.91, 42,948.31 and 16,974.91

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Solution

The fourth proportional to 31,122.91, 42,948.31 and 16,974.91 is: 23,424.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,122.91 : 42,948.31 = 16,974.91 : x
  2. Step 2: Convert to fraction form
    31,122.91/42,948.31 = 16,974.91/x
  3. Step 3: Cross multiply
    31,122.91x = 42,948.31 × 16,974.91
  4. Step 4: Simplify right side
    31,122.91x = 729,043,696.90
  5. Step 5: Solve for x
    x = 729,043,696.90/31,122.91
  6. Step 6: Final answer
    x = 23,424.66

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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.