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Finding the Fourth Proportional to 12,868.55, 17,757.10 and 7,203.61

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Solution

The fourth proportional to 12,868.55, 17,757.10 and 7,203.61 is: 9,940.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,868.55 : 17,757.10 = 7,203.61 : x
  2. Step 2: Convert to fraction form
    12,868.55/17,757.10 = 7,203.61/x
  3. Step 3: Cross multiply
    12,868.55x = 17,757.10 × 7,203.61
  4. Step 4: Simplify right side
    12,868.55x = 127,915,223.13
  5. Step 5: Solve for x
    x = 127,915,223.13/12,868.55
  6. Step 6: Final answer
    x = 9,940.14

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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.