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Finding the Fourth Proportional to 12,759.50, 17,608.12 and 7,170.50

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Solution

The fourth proportional to 12,759.50, 17,608.12 and 7,170.50 is: 9,895.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,759.50 : 17,608.12 = 7,170.50 : x
  2. Step 2: Convert to fraction form
    12,759.50/17,608.12 = 7,170.50/x
  3. Step 3: Cross multiply
    12,759.50x = 17,608.12 × 7,170.50
  4. Step 4: Simplify right side
    12,759.50x = 126,259,024.46
  5. Step 5: Solve for x
    x = 126,259,024.46/12,759.50
  6. Step 6: Final answer
    x = 9,895.30

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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.