Home / 20,279.44-27,985.68-11,327.28

Finding the Fourth Proportional to 20,279.44, 27,985.68 and 11,327.28

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Solution

The fourth proportional to 20,279.44, 27,985.68 and 11,327.28 is: 15,631.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.44 : 27,985.68 = 11,327.28 : x
  2. Step 2: Convert to fraction form
    20,279.44/27,985.68 = 11,327.28/x
  3. Step 3: Cross multiply
    20,279.44x = 27,985.68 × 11,327.28
  4. Step 4: Simplify right side
    20,279.44x = 317,001,633.35
  5. Step 5: Solve for x
    x = 317,001,633.35/20,279.44
  6. Step 6: Final answer
    x = 15,631.68

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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.