Home / 20,876.76-31,350.42-20,715.48

Finding the Fourth Proportional to 20,876.76, 31,350.42 and 20,715.48

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Solution

The fourth proportional to 20,876.76, 31,350.42 and 20,715.48 is: 31,108.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.76 : 31,350.42 = 20,715.48 : x
  2. Step 2: Convert to fraction form
    20,876.76/31,350.42 = 20,715.48/x
  3. Step 3: Cross multiply
    20,876.76x = 31,350.42 × 20,715.48
  4. Step 4: Simplify right side
    20,876.76x = 649,438,998.50
  5. Step 5: Solve for x
    x = 649,438,998.50/20,876.76
  6. Step 6: Final answer
    x = 31,108.23

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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.