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Finding the Fourth Proportional to 12,867.84, 17,757.96 and 7,278.96

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Solution

The fourth proportional to 12,867.84, 17,757.96 and 7,278.96 is: 10,045.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,867.84 : 17,757.96 = 7,278.96 : x
  2. Step 2: Convert to fraction form
    12,867.84/17,757.96 = 7,278.96/x
  3. Step 3: Cross multiply
    12,867.84x = 17,757.96 × 7,278.96
  4. Step 4: Simplify right side
    12,867.84x = 129,259,480.52
  5. Step 5: Solve for x
    x = 129,259,480.52/12,867.84
  6. Step 6: Final answer
    x = 10,045.16

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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.