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Finding the Fourth Proportional to 12,661.76, 18,979.67 and 6,410.18

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Solution

The fourth proportional to 12,661.76, 18,979.67 and 6,410.18 is: 9,608.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.76 : 18,979.67 = 6,410.18 : x
  2. Step 2: Convert to fraction form
    12,661.76/18,979.67 = 6,410.18/x
  3. Step 3: Cross multiply
    12,661.76x = 18,979.67 × 6,410.18
  4. Step 4: Simplify right side
    12,661.76x = 121,662,974.09
  5. Step 5: Solve for x
    x = 121,662,974.09/12,661.76
  6. Step 6: Final answer
    x = 9,608.70

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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.