Home / 20,279.92-30,356.16-12,892.72

Finding the Fourth Proportional to 20,279.92, 30,356.16 and 12,892.72

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Solution

The fourth proportional to 20,279.92, 30,356.16 and 12,892.72 is: 19,298.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.92 : 30,356.16 = 12,892.72 : x
  2. Step 2: Convert to fraction form
    20,279.92/30,356.16 = 12,892.72/x
  3. Step 3: Cross multiply
    20,279.92x = 30,356.16 × 12,892.72
  4. Step 4: Simplify right side
    20,279.92x = 391,373,471.16
  5. Step 5: Solve for x
    x = 391,373,471.16/20,279.92
  6. Step 6: Final answer
    x = 19,298.57

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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.