Home / 21,489.35-29,640.96-13,944.20

Finding the Fourth Proportional to 21,489.35, 29,640.96 and 13,944.20

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Solution

The fourth proportional to 21,489.35, 29,640.96 and 13,944.20 is: 19,233.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.35 : 29,640.96 = 13,944.20 : x
  2. Step 2: Convert to fraction form
    21,489.35/29,640.96 = 13,944.20/x
  3. Step 3: Cross multiply
    21,489.35x = 29,640.96 × 13,944.20
  4. Step 4: Simplify right side
    21,489.35x = 413,319,326.23
  5. Step 5: Solve for x
    x = 413,319,326.23/21,489.35
  6. Step 6: Final answer
    x = 19,233.69

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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.