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Finding the Fourth Proportional to 18,087.40, 27,131.10 and 13,713.40

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Solution

The fourth proportional to 18,087.40, 27,131.10 and 13,713.40 is: 20,570.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,087.40 : 27,131.10 = 13,713.40 : x
  2. Step 2: Convert to fraction form
    18,087.40/27,131.10 = 13,713.40/x
  3. Step 3: Cross multiply
    18,087.40x = 27,131.10 × 13,713.40
  4. Step 4: Simplify right side
    18,087.40x = 372,059,626.74
  5. Step 5: Solve for x
    x = 372,059,626.74/18,087.40
  6. Step 6: Final answer
    x = 20,570.10

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Half scale
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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.