Home / 28,822.28-39,789.78-20,458.76

Finding the Fourth Proportional to 28,822.28, 39,789.78 and 20,458.76

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Solution

The fourth proportional to 28,822.28, 39,789.78 and 20,458.76 is: 28,243.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,822.28 : 39,789.78 = 20,458.76 : x
  2. Step 2: Convert to fraction form
    28,822.28/39,789.78 = 20,458.76/x
  3. Step 3: Cross multiply
    28,822.28x = 39,789.78 × 20,458.76
  4. Step 4: Simplify right side
    28,822.28x = 814,049,559.47
  5. Step 5: Solve for x
    x = 814,049,559.47/28,822.28
  6. Step 6: Final answer
    x = 28,243.76

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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.