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Finding the Fourth Proportional to 12,480.75, 17,223.45 and 6,891.75

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Solution

The fourth proportional to 12,480.75, 17,223.45 and 6,891.75 is: 9,510.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.75 : 17,223.45 = 6,891.75 : x
  2. Step 2: Convert to fraction form
    12,480.75/17,223.45 = 6,891.75/x
  3. Step 3: Cross multiply
    12,480.75x = 17,223.45 × 6,891.75
  4. Step 4: Simplify right side
    12,480.75x = 118,699,711.54
  5. Step 5: Solve for x
    x = 118,699,711.54/12,480.75
  6. Step 6: Final answer
    x = 9,510.62

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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.