Home / 21,445.62-29,609.40-13,391.54

Finding the Fourth Proportional to 21,445.62, 29,609.40 and 13,391.54

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Solution

The fourth proportional to 21,445.62, 29,609.40 and 13,391.54 is: 18,489.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,445.62 : 29,609.40 = 13,391.54 : x
  2. Step 2: Convert to fraction form
    21,445.62/29,609.40 = 13,391.54/x
  3. Step 3: Cross multiply
    21,445.62x = 29,609.40 × 13,391.54
  4. Step 4: Simplify right side
    21,445.62x = 396,515,464.48
  5. Step 5: Solve for x
    x = 396,515,464.48/21,445.62
  6. Step 6: Final answer
    x = 18,489.34

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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.