Home / 27,690.39-38,212.73-15,115.14

Finding the Fourth Proportional to 27,690.39, 38,212.73 and 15,115.14

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Solution

The fourth proportional to 27,690.39, 38,212.73 and 15,115.14 is: 20,858.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,690.39 : 38,212.73 = 15,115.14 : x
  2. Step 2: Convert to fraction form
    27,690.39/38,212.73 = 15,115.14/x
  3. Step 3: Cross multiply
    27,690.39x = 38,212.73 × 15,115.14
  4. Step 4: Simplify right side
    27,690.39x = 577,590,763.73
  5. Step 5: Solve for x
    x = 577,590,763.73/27,690.39
  6. Step 6: Final answer
    x = 20,858.89

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Half scale
Find fourth proportional to 55,380.78, 76,425.46 and 30,230.28
Double scale
Find fourth proportional to 27,691.39, 38,214.11 and 15,116.14
Similar ratio
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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.