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Finding the Fourth Proportional to 12,868.95, 17,757.86 and 7,203.33

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Solution

The fourth proportional to 12,868.95, 17,757.86 and 7,203.33 is: 9,939.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,868.95 : 17,757.86 = 7,203.33 : x
  2. Step 2: Convert to fraction form
    12,868.95/17,757.86 = 7,203.33/x
  3. Step 3: Cross multiply
    12,868.95x = 17,757.86 × 7,203.33
  4. Step 4: Simplify right side
    12,868.95x = 127,915,689.66
  5. Step 5: Solve for x
    x = 127,915,689.66/12,868.95
  6. Step 6: Final answer
    x = 9,939.87

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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.