Home / 20,279.96-30,419.48-9,178.61

Finding the Fourth Proportional to 20,279.96, 30,419.48 and 9,178.61

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Solution

The fourth proportional to 20,279.96, 30,419.48 and 9,178.61 is: 13,767.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.96 : 30,419.48 = 9,178.61 : x
  2. Step 2: Convert to fraction form
    20,279.96/30,419.48 = 9,178.61/x
  3. Step 3: Cross multiply
    20,279.96x = 30,419.48 × 9,178.61
  4. Step 4: Simplify right side
    20,279.96x = 279,208,345.33
  5. Step 5: Solve for x
    x = 279,208,345.33/20,279.96
  6. Step 6: Final answer
    x = 13,767.70

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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.