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Finding the Fourth Proportional to 11,187.71, 16,781.79 and 8,956.18

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Solution

The fourth proportional to 11,187.71, 16,781.79 and 8,956.18 is: 13,434.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,187.71 : 16,781.79 = 8,956.18 : x
  2. Step 2: Convert to fraction form
    11,187.71/16,781.79 = 8,956.18/x
  3. Step 3: Cross multiply
    11,187.71x = 16,781.79 × 8,956.18
  4. Step 4: Simplify right side
    11,187.71x = 150,300,766.04
  5. Step 5: Solve for x
    x = 150,300,766.04/11,187.71
  6. Step 6: Final answer
    x = 13,434.46

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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.