Home / 20,861.15-28,792.16-13,309.82

Finding the Fourth Proportional to 20,861.15, 28,792.16 and 13,309.82

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Solution

The fourth proportional to 20,861.15, 28,792.16 and 13,309.82 is: 18,369.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.15 : 28,792.16 = 13,309.82 : x
  2. Step 2: Convert to fraction form
    20,861.15/28,792.16 = 13,309.82/x
  3. Step 3: Cross multiply
    20,861.15x = 28,792.16 × 13,309.82
  4. Step 4: Simplify right side
    20,861.15x = 383,218,414.38
  5. Step 5: Solve for x
    x = 383,218,414.38/20,861.15
  6. Step 6: Final answer
    x = 18,369.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.