Home / 29,218.52-40,321.56-15,789.76

Finding the Fourth Proportional to 29,218.52, 40,321.56 and 15,789.76

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Solution

The fourth proportional to 29,218.52, 40,321.56 and 15,789.76 is: 21,789.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,218.52 : 40,321.56 = 15,789.76 : x
  2. Step 2: Convert to fraction form
    29,218.52/40,321.56 = 15,789.76/x
  3. Step 3: Cross multiply
    29,218.52x = 40,321.56 × 15,789.76
  4. Step 4: Simplify right side
    29,218.52x = 636,667,940.44
  5. Step 5: Solve for x
    x = 636,667,940.44/29,218.52
  6. Step 6: Final answer
    x = 21,789.88

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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.