Home / 20,789.28-31,186.02-6,748.72

Finding the Fourth Proportional to 20,789.28, 31,186.02 and 6,748.72

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Solution

The fourth proportional to 20,789.28, 31,186.02 and 6,748.72 is: 10,123.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.28 : 31,186.02 = 6,748.72 : x
  2. Step 2: Convert to fraction form
    20,789.28/31,186.02 = 6,748.72/x
  3. Step 3: Cross multiply
    20,789.28x = 31,186.02 × 6,748.72
  4. Step 4: Simplify right side
    20,789.28x = 210,465,716.89
  5. Step 5: Solve for x
    x = 210,465,716.89/20,789.28
  6. Step 6: Final answer
    x = 10,123.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.