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Finding the Fourth Proportional to 27,991.79, 38,616.18 and 18,914.22

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Solution

The fourth proportional to 27,991.79, 38,616.18 and 18,914.22 is: 26,093.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,991.79 : 38,616.18 = 18,914.22 : x
  2. Step 2: Convert to fraction form
    27,991.79/38,616.18 = 18,914.22/x
  3. Step 3: Cross multiply
    27,991.79x = 38,616.18 × 18,914.22
  4. Step 4: Simplify right side
    27,991.79x = 730,394,924.08
  5. Step 5: Solve for x
    x = 730,394,924.08/27,991.79
  6. Step 6: Final answer
    x = 26,093.19

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Double scale
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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.