Home / 31,121.32-42,947.52-16,974.20

Finding the Fourth Proportional to 31,121.32, 42,947.52 and 16,974.20

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Solution

The fourth proportional to 31,121.32, 42,947.52 and 16,974.20 is: 23,424.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.32 : 42,947.52 = 16,974.20 : x
  2. Step 2: Convert to fraction form
    31,121.32/42,947.52 = 16,974.20/x
  3. Step 3: Cross multiply
    31,121.32x = 42,947.52 × 16,974.20
  4. Step 4: Simplify right side
    31,121.32x = 728,999,793.98
  5. Step 5: Solve for x
    x = 728,999,793.98/31,121.32
  6. Step 6: Final answer
    x = 23,424.45

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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.