Home / 20,711.70-31,065.23-5,720.95

Finding the Fourth Proportional to 20,711.70, 31,065.23 and 5,720.95

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Solution

The fourth proportional to 20,711.70, 31,065.23 and 5,720.95 is: 8,580.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.70 : 31,065.23 = 5,720.95 : x
  2. Step 2: Convert to fraction form
    20,711.70/31,065.23 = 5,720.95/x
  3. Step 3: Cross multiply
    20,711.70x = 31,065.23 × 5,720.95
  4. Step 4: Simplify right side
    20,711.70x = 177,722,598.96
  5. Step 5: Solve for x
    x = 177,722,598.96/20,711.70
  6. Step 6: Final answer
    x = 8,580.78

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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.