Home / 20,715.50-31,077.31-8,233.20

Finding the Fourth Proportional to 20,715.50, 31,077.31 and 8,233.20

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Solution

The fourth proportional to 20,715.50, 31,077.31 and 8,233.20 is: 12,351.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.50 : 31,077.31 = 8,233.20 : x
  2. Step 2: Convert to fraction form
    20,715.50/31,077.31 = 8,233.20/x
  3. Step 3: Cross multiply
    20,715.50x = 31,077.31 × 8,233.20
  4. Step 4: Simplify right side
    20,715.50x = 255,865,708.69
  5. Step 5: Solve for x
    x = 255,865,708.69/20,715.50
  6. Step 6: Final answer
    x = 12,351.41

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1.5x scale

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.