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Finding the Fourth Proportional to 13,938.75, 20,908.13 and 4,704.75

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Solution

The fourth proportional to 13,938.75, 20,908.13 and 4,704.75 is: 7,057.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.75 : 20,908.13 = 4,704.75 : x
  2. Step 2: Convert to fraction form
    13,938.75/20,908.13 = 4,704.75/x
  3. Step 3: Cross multiply
    13,938.75x = 20,908.13 × 4,704.75
  4. Step 4: Simplify right side
    13,938.75x = 98,367,524.62
  5. Step 5: Solve for x
    x = 98,367,524.62/13,938.75
  6. Step 6: Final answer
    x = 7,057.13

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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.