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Finding the Fourth Proportional to 13,432.70, 20,149.05 and 11,245.70

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Solution

The fourth proportional to 13,432.70, 20,149.05 and 11,245.70 is: 16,868.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,432.70 : 20,149.05 = 11,245.70 : x
  2. Step 2: Convert to fraction form
    13,432.70/20,149.05 = 11,245.70/x
  3. Step 3: Cross multiply
    13,432.70x = 20,149.05 × 11,245.70
  4. Step 4: Simplify right side
    13,432.70x = 226,590,171.59
  5. Step 5: Solve for x
    x = 226,590,171.59/13,432.70
  6. Step 6: Final answer
    x = 16,868.55

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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.