Home / 20,600.05-30,916.49-8,123.21

Finding the Fourth Proportional to 20,600.05, 30,916.49 and 8,123.21

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Solution

The fourth proportional to 20,600.05, 30,916.49 and 8,123.21 is: 12,191.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,600.05 : 30,916.49 = 8,123.21 : x
  2. Step 2: Convert to fraction form
    20,600.05/30,916.49 = 8,123.21/x
  3. Step 3: Cross multiply
    20,600.05x = 30,916.49 × 8,123.21
  4. Step 4: Simplify right side
    20,600.05x = 251,141,177.41
  5. Step 5: Solve for x
    x = 251,141,177.41/20,600.05
  6. Step 6: Final answer
    x = 12,191.29

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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.