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Finding the Fourth Proportional to 18,131.35, 27,207.81 and 9,811.20

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Solution

The fourth proportional to 18,131.35, 27,207.81 and 9,811.20 is: 14,722.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,131.35 : 27,207.81 = 9,811.20 : x
  2. Step 2: Convert to fraction form
    18,131.35/27,207.81 = 9,811.20/x
  3. Step 3: Cross multiply
    18,131.35x = 27,207.81 × 9,811.20
  4. Step 4: Simplify right side
    18,131.35x = 266,941,265.47
  5. Step 5: Solve for x
    x = 266,941,265.47/18,131.35
  6. Step 6: Final answer
    x = 14,722.64

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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.