Home / 21,149.43-29,173-13,605.58

Finding the Fourth Proportional to 21,149.43, 29,173 and 13,605.58

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Solution

The fourth proportional to 21,149.43, 29,173 and 13,605.58 is: 18,767.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.43 : 29,173 = 13,605.58 : x
  2. Step 2: Convert to fraction form
    21,149.43/29,173 = 13,605.58/x
  3. Step 3: Cross multiply
    21,149.43x = 29,173 × 13,605.58
  4. Step 4: Simplify right side
    21,149.43x = 396,915,585.34
  5. Step 5: Solve for x
    x = 396,915,585.34/21,149.43
  6. Step 6: Final answer
    x = 18,767.20

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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.