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Finding the Fourth Proportional to 18,881.08, 28,318.14 and 8,747.08

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Solution

The fourth proportional to 18,881.08, 28,318.14 and 8,747.08 is: 13,119.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.08 : 28,318.14 = 8,747.08 : x
  2. Step 2: Convert to fraction form
    18,881.08/28,318.14 = 8,747.08/x
  3. Step 3: Cross multiply
    18,881.08x = 28,318.14 × 8,747.08
  4. Step 4: Simplify right side
    18,881.08x = 247,701,036.03
  5. Step 5: Solve for x
    x = 247,701,036.03/18,881.08
  6. Step 6: Final answer
    x = 13,119.01

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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.