Home / 13,822.12-20,711.42-8,620.20

Finding the Fourth Proportional to 13,822.12, 20,711.42 and 8,620.20

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Solution

The fourth proportional to 13,822.12, 20,711.42 and 8,620.20 is: 12,916.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,822.12 : 20,711.42 = 8,620.20 : x
  2. Step 2: Convert to fraction form
    13,822.12/20,711.42 = 8,620.20/x
  3. Step 3: Cross multiply
    13,822.12x = 20,711.42 × 8,620.20
  4. Step 4: Simplify right side
    13,822.12x = 178,536,582.68
  5. Step 5: Solve for x
    x = 178,536,582.68/13,822.12
  6. Step 6: Final answer
    x = 12,916.73

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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.