Home / 21,380.52-29,502.56-11,819.12

Finding the Fourth Proportional to 21,380.52, 29,502.56 and 11,819.12

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Solution

The fourth proportional to 21,380.52, 29,502.56 and 11,819.12 is: 16,308.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,380.52 : 29,502.56 = 11,819.12 : x
  2. Step 2: Convert to fraction form
    21,380.52/29,502.56 = 11,819.12/x
  3. Step 3: Cross multiply
    21,380.52x = 29,502.56 × 11,819.12
  4. Step 4: Simplify right side
    21,380.52x = 348,694,149.43
  5. Step 5: Solve for x
    x = 348,694,149.43/21,380.52
  6. Step 6: Final answer
    x = 16,308.96

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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.