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Finding the Fourth Proportional to 12,661.38, 18,994.37 and 6,339.56

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Solution

The fourth proportional to 12,661.38, 18,994.37 and 6,339.56 is: 9,510.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.38 : 18,994.37 = 6,339.56 : x
  2. Step 2: Convert to fraction form
    12,661.38/18,994.37 = 6,339.56/x
  3. Step 3: Cross multiply
    12,661.38x = 18,994.37 × 6,339.56
  4. Step 4: Simplify right side
    12,661.38x = 120,415,821.61
  5. Step 5: Solve for x
    x = 120,415,821.61/12,661.38
  6. Step 6: Final answer
    x = 9,510.48

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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.