Home / 31,121.64-42,947.28-16,974.24

Finding the Fourth Proportional to 31,121.64, 42,947.28 and 16,974.24

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Solution

The fourth proportional to 31,121.64, 42,947.28 and 16,974.24 is: 23,424.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.64 : 42,947.28 = 16,974.24 : x
  2. Step 2: Convert to fraction form
    31,121.64/42,947.28 = 16,974.24/x
  3. Step 3: Cross multiply
    31,121.64x = 42,947.28 × 16,974.24
  4. Step 4: Simplify right side
    31,121.64x = 728,997,438.07
  5. Step 5: Solve for x
    x = 728,997,438.07/31,121.64
  6. Step 6: Final answer
    x = 23,424.13

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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.