Home / 31,121.21-42,947.21-16,974.06

Finding the Fourth Proportional to 31,121.21, 42,947.21 and 16,974.06

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Solution

The fourth proportional to 31,121.21, 42,947.21 and 16,974.06 is: 23,424.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.21 : 42,947.21 = 16,974.06 : x
  2. Step 2: Convert to fraction form
    31,121.21/42,947.21 = 16,974.06/x
  3. Step 3: Cross multiply
    31,121.21x = 42,947.21 × 16,974.06
  4. Step 4: Simplify right side
    31,121.21x = 728,988,400.76
  5. Step 5: Solve for x
    x = 728,988,400.76/31,121.21
  6. Step 6: Final answer
    x = 23,424.16

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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.