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Finding the Fourth Proportional to 15,162.48, 20,920.68 and 8,872.56

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Solution

The fourth proportional to 15,162.48, 20,920.68 and 8,872.56 is: 12,242.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,162.48 : 20,920.68 = 8,872.56 : x
  2. Step 2: Convert to fraction form
    15,162.48/20,920.68 = 8,872.56/x
  3. Step 3: Cross multiply
    15,162.48x = 20,920.68 × 8,872.56
  4. Step 4: Simplify right side
    15,162.48x = 185,619,988.54
  5. Step 5: Solve for x
    x = 185,619,988.54/15,162.48
  6. Step 6: Final answer
    x = 12,242.06

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.