Home / 20,279.76-27,997.88-13,479.28

Finding the Fourth Proportional to 20,279.76, 27,997.88 and 13,479.28

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Solution

The fourth proportional to 20,279.76, 27,997.88 and 13,479.28 is: 18,609.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.76 : 27,997.88 = 13,479.28 : x
  2. Step 2: Convert to fraction form
    20,279.76/27,997.88 = 13,479.28/x
  3. Step 3: Cross multiply
    20,279.76x = 27,997.88 × 13,479.28
  4. Step 4: Simplify right side
    20,279.76x = 377,391,263.93
  5. Step 5: Solve for x
    x = 377,391,263.93/20,279.76
  6. Step 6: Final answer
    x = 18,609.26

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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.