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Finding the Fourth Proportional to 15,178.22, 20,945.96 and 8,463.71

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Solution

The fourth proportional to 15,178.22, 20,945.96 and 8,463.71 is: 11,679.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,178.22 : 20,945.96 = 8,463.71 : x
  2. Step 2: Convert to fraction form
    15,178.22/20,945.96 = 8,463.71/x
  3. Step 3: Cross multiply
    15,178.22x = 20,945.96 × 8,463.71
  4. Step 4: Simplify right side
    15,178.22x = 177,280,531.11
  5. Step 5: Solve for x
    x = 177,280,531.11/15,178.22
  6. Step 6: Final answer
    x = 11,679.93

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1.5x scale

Why These Related Problems?

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