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Finding the Fourth Proportional to 15,193.92, 20,968.66 and 8,480.85

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Solution

The fourth proportional to 15,193.92, 20,968.66 and 8,480.85 is: 11,704.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,193.92 : 20,968.66 = 8,480.85 : x
  2. Step 2: Convert to fraction form
    15,193.92/20,968.66 = 8,480.85/x
  3. Step 3: Cross multiply
    15,193.92x = 20,968.66 × 8,480.85
  4. Step 4: Simplify right side
    15,193.92x = 177,832,017.76
  5. Step 5: Solve for x
    x = 177,832,017.76/15,193.92
  6. Step 6: Final answer
    x = 11,704.16

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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.