Home / 21,097.38-29,100.66-13,531.72

Finding the Fourth Proportional to 21,097.38, 29,100.66 and 13,531.72

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Solution

The fourth proportional to 21,097.38, 29,100.66 and 13,531.72 is: 18,664.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,097.38 : 29,100.66 = 13,531.72 : x
  2. Step 2: Convert to fraction form
    21,097.38/29,100.66 = 13,531.72/x
  3. Step 3: Cross multiply
    21,097.38x = 29,100.66 × 13,531.72
  4. Step 4: Simplify right side
    21,097.38x = 393,781,859.44
  5. Step 5: Solve for x
    x = 393,781,859.44/21,097.38
  6. Step 6: Final answer
    x = 18,664.97

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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.