Home / 20,279.25-27,985.30-11,326.76

Finding the Fourth Proportional to 20,279.25, 27,985.30 and 11,326.76

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Solution

The fourth proportional to 20,279.25, 27,985.30 and 11,326.76 is: 15,630.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.25 : 27,985.30 = 11,326.76 : x
  2. Step 2: Convert to fraction form
    20,279.25/27,985.30 = 11,326.76/x
  3. Step 3: Cross multiply
    20,279.25x = 27,985.30 × 11,326.76
  4. Step 4: Simplify right side
    20,279.25x = 316,982,776.63
  5. Step 5: Solve for x
    x = 316,982,776.63/20,279.25
  6. Step 6: Final answer
    x = 15,630.89

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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.