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Finding the Fourth Proportional to 13,481.57, 20,295.16 and 12,125.28

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Solution

The fourth proportional to 13,481.57, 20,295.16 and 12,125.28 is: 18,253.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,481.57 : 20,295.16 = 12,125.28 : x
  2. Step 2: Convert to fraction form
    13,481.57/20,295.16 = 12,125.28/x
  3. Step 3: Cross multiply
    13,481.57x = 20,295.16 × 12,125.28
  4. Step 4: Simplify right side
    13,481.57x = 246,084,543.44
  5. Step 5: Solve for x
    x = 246,084,543.44/13,481.57
  6. Step 6: Final answer
    x = 18,253.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.