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Finding the Fourth Proportional to 13,432.80, 20,149.10 and 4,072.80

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Solution

The fourth proportional to 13,432.80, 20,149.10 and 4,072.80 is: 6,109.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,432.80 : 20,149.10 = 4,072.80 : x
  2. Step 2: Convert to fraction form
    13,432.80/20,149.10 = 4,072.80/x
  3. Step 3: Cross multiply
    13,432.80x = 20,149.10 × 4,072.80
  4. Step 4: Simplify right side
    13,432.80x = 82,063,254.48
  5. Step 5: Solve for x
    x = 82,063,254.48/13,432.80
  6. Step 6: Final answer
    x = 6,109.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.