Home / 20,279.45-27,986.44-11,781.47

Finding the Fourth Proportional to 20,279.45, 27,986.44 and 11,781.47

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Solution

The fourth proportional to 20,279.45, 27,986.44 and 11,781.47 is: 16,258.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.45 : 27,986.44 = 11,781.47 : x
  2. Step 2: Convert to fraction form
    20,279.45/27,986.44 = 11,781.47/x
  3. Step 3: Cross multiply
    20,279.45x = 27,986.44 × 11,781.47
  4. Step 4: Simplify right side
    20,279.45x = 329,721,373.81
  5. Step 5: Solve for x
    x = 329,721,373.81/20,279.45
  6. Step 6: Final answer
    x = 16,258.89

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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.