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Finding the Fourth Proportional to 12,660.91, 18,993.18 and 4,343.02

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Solution

The fourth proportional to 12,660.91, 18,993.18 and 4,343.02 is: 6,515.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.91 : 18,993.18 = 4,343.02 : x
  2. Step 2: Convert to fraction form
    12,660.91/18,993.18 = 4,343.02/x
  3. Step 3: Cross multiply
    12,660.91x = 18,993.18 × 4,343.02
  4. Step 4: Simplify right side
    12,660.91x = 82,487,729.41
  5. Step 5: Solve for x
    x = 82,487,729.41/12,660.91
  6. Step 6: Final answer
    x = 6,515.15

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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.