Home / 20,279.18-27,986.36-11,326.88

Finding the Fourth Proportional to 20,279.18, 27,986.36 and 11,326.88

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Solution

The fourth proportional to 20,279.18, 27,986.36 and 11,326.88 is: 15,631.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.18 : 27,986.36 = 11,326.88 : x
  2. Step 2: Convert to fraction form
    20,279.18/27,986.36 = 11,326.88/x
  3. Step 3: Cross multiply
    20,279.18x = 27,986.36 × 11,326.88
  4. Step 4: Simplify right side
    20,279.18x = 316,997,944.79
  5. Step 5: Solve for x
    x = 316,997,944.79/20,279.18
  6. Step 6: Final answer
    x = 15,631.70

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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.