Home / 20,279.64-27,999.74-13,126.87

Finding the Fourth Proportional to 20,279.64, 27,999.74 and 13,126.87

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Solution

The fourth proportional to 20,279.64, 27,999.74 and 13,126.87 is: 18,124.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.64 : 27,999.74 = 13,126.87 : x
  2. Step 2: Convert to fraction form
    20,279.64/27,999.74 = 13,126.87/x
  3. Step 3: Cross multiply
    20,279.64x = 27,999.74 × 13,126.87
  4. Step 4: Simplify right side
    20,279.64x = 367,548,909.83
  5. Step 5: Solve for x
    x = 367,548,909.83/20,279.64
  6. Step 6: Final answer
    x = 18,124.04

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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.