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Finding the Fourth Proportional to 12,659.97, 18,988.29 and 3,894.15

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Solution

The fourth proportional to 12,659.97, 18,988.29 and 3,894.15 is: 5,840.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.97 : 18,988.29 = 3,894.15 : x
  2. Step 2: Convert to fraction form
    12,659.97/18,988.29 = 3,894.15/x
  3. Step 3: Cross multiply
    12,659.97x = 18,988.29 × 3,894.15
  4. Step 4: Simplify right side
    12,659.97x = 73,943,249.50
  5. Step 5: Solve for x
    x = 73,943,249.50/12,659.97
  6. Step 6: Final answer
    x = 5,840.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.