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Finding the Fourth Proportional to 27,843.60, 38,425.20 and 15,908.40

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Solution

The fourth proportional to 27,843.60, 38,425.20 and 15,908.40 is: 21,954.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,843.60 : 38,425.20 = 15,908.40 : x
  2. Step 2: Convert to fraction form
    27,843.60/38,425.20 = 15,908.40/x
  3. Step 3: Cross multiply
    27,843.60x = 38,425.20 × 15,908.40
  4. Step 4: Simplify right side
    27,843.60x = 611,283,451.68
  5. Step 5: Solve for x
    x = 611,283,451.68/27,843.60
  6. Step 6: Final answer
    x = 21,954.18

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Half scale
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Double scale
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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.