Home / 20,474.85-30,719.76-8,631.60

Finding the Fourth Proportional to 20,474.85, 30,719.76 and 8,631.60

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Solution

The fourth proportional to 20,474.85, 30,719.76 and 8,631.60 is: 12,950.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.85 : 30,719.76 = 8,631.60 : x
  2. Step 2: Convert to fraction form
    20,474.85/30,719.76 = 8,631.60/x
  3. Step 3: Cross multiply
    20,474.85x = 30,719.76 × 8,631.60
  4. Step 4: Simplify right side
    20,474.85x = 265,160,680.42
  5. Step 5: Solve for x
    x = 265,160,680.42/20,474.85
  6. Step 6: Final answer
    x = 12,950.56

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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.