Home / 20,217.70-30,294.15-12,808.90

Finding the Fourth Proportional to 20,217.70, 30,294.15 and 12,808.90

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Solution

The fourth proportional to 20,217.70, 30,294.15 and 12,808.90 is: 19,192.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,217.70 : 30,294.15 = 12,808.90 : x
  2. Step 2: Convert to fraction form
    20,217.70/30,294.15 = 12,808.90/x
  3. Step 3: Cross multiply
    20,217.70x = 30,294.15 × 12,808.90
  4. Step 4: Simplify right side
    20,217.70x = 388,034,737.94
  5. Step 5: Solve for x
    x = 388,034,737.94/20,217.70
  6. Step 6: Final answer
    x = 19,192.82

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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.