Home / 23,131.25-31,921.13-12,520.97

Finding the Fourth Proportional to 23,131.25, 31,921.13 and 12,520.97

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Solution

The fourth proportional to 23,131.25, 31,921.13 and 12,520.97 is: 17,278.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,131.25 : 31,921.13 = 12,520.97 : x
  2. Step 2: Convert to fraction form
    23,131.25/31,921.13 = 12,520.97/x
  3. Step 3: Cross multiply
    23,131.25x = 31,921.13 × 12,520.97
  4. Step 4: Simplify right side
    23,131.25x = 399,683,511.10
  5. Step 5: Solve for x
    x = 399,683,511.10/23,131.25
  6. Step 6: Final answer
    x = 17,278.94

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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.