Home / 20,916.71-31,380.00-6,876.77

Finding the Fourth Proportional to 20,916.71, 31,380.00 and 6,876.77

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Solution

The fourth proportional to 20,916.71, 31,380.00 and 6,876.77 is: 10,316.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.71 : 31,380.00 = 6,876.77 : x
  2. Step 2: Convert to fraction form
    20,916.71/31,380.00 = 6,876.77/x
  3. Step 3: Cross multiply
    20,916.71x = 31,380.00 × 6,876.77
  4. Step 4: Simplify right side
    20,916.71x = 215,793,144.02
  5. Step 5: Solve for x
    x = 215,793,144.02/20,916.71
  6. Step 6: Final answer
    x = 10,316.78

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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.