Home / 21,649.35-29,872.90-13,147.04

Finding the Fourth Proportional to 21,649.35, 29,872.90 and 13,147.04

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Solution

The fourth proportional to 21,649.35, 29,872.90 and 13,147.04 is: 18,140.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,649.35 : 29,872.90 = 13,147.04 : x
  2. Step 2: Convert to fraction form
    21,649.35/29,872.90 = 13,147.04/x
  3. Step 3: Cross multiply
    21,649.35x = 29,872.90 × 13,147.04
  4. Step 4: Simplify right side
    21,649.35x = 392,740,302.33
  5. Step 5: Solve for x
    x = 392,740,302.33/21,649.35
  6. Step 6: Final answer
    x = 18,140.97

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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.