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Finding the Fourth Proportional to 12,660.43, 18,975.22 and 8,963.71

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Solution

The fourth proportional to 12,660.43, 18,975.22 and 8,963.71 is: 13,434.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.43 : 18,975.22 = 8,963.71 : x
  2. Step 2: Convert to fraction form
    12,660.43/18,975.22 = 8,963.71/x
  3. Step 3: Cross multiply
    12,660.43x = 18,975.22 × 8,963.71
  4. Step 4: Simplify right side
    12,660.43x = 170,088,369.27
  5. Step 5: Solve for x
    x = 170,088,369.27/12,660.43
  6. Step 6: Final answer
    x = 13,434.64

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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.