Home / 21,331.75-29,434.17-12,377.20

Finding the Fourth Proportional to 21,331.75, 29,434.17 and 12,377.20

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Solution

The fourth proportional to 21,331.75, 29,434.17 and 12,377.20 is: 17,078.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.75 : 29,434.17 = 12,377.20 : x
  2. Step 2: Convert to fraction form
    21,331.75/29,434.17 = 12,377.20/x
  3. Step 3: Cross multiply
    21,331.75x = 29,434.17 × 12,377.20
  4. Step 4: Simplify right side
    21,331.75x = 364,312,608.92
  5. Step 5: Solve for x
    x = 364,312,608.92/21,331.75
  6. Step 6: Final answer
    x = 17,078.42

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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.