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Finding the Fourth Proportional to 15,059.92, 20,781.12 and 8,772.16

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Solution

The fourth proportional to 15,059.92, 20,781.12 and 8,772.16 is: 12,104.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,059.92 : 20,781.12 = 8,772.16 : x
  2. Step 2: Convert to fraction form
    15,059.92/20,781.12 = 8,772.16/x
  3. Step 3: Cross multiply
    15,059.92x = 20,781.12 × 8,772.16
  4. Step 4: Simplify right side
    15,059.92x = 182,295,309.62
  5. Step 5: Solve for x
    x = 182,295,309.62/15,059.92
  6. Step 6: Final answer
    x = 12,104.67

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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.