Home / 29,218.50-40,321.55-15,789.72

Finding the Fourth Proportional to 29,218.50, 40,321.55 and 15,789.72

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Solution

The fourth proportional to 29,218.50, 40,321.55 and 15,789.72 is: 21,789.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,218.50 : 40,321.55 = 15,789.72 : x
  2. Step 2: Convert to fraction form
    29,218.50/40,321.55 = 15,789.72/x
  3. Step 3: Cross multiply
    29,218.50x = 40,321.55 × 15,789.72
  4. Step 4: Simplify right side
    29,218.50x = 636,665,905.52
  5. Step 5: Solve for x
    x = 636,665,905.52/29,218.50
  6. Step 6: Final answer
    x = 21,789.82

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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.