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Finding the Fourth Proportional to 12,381.65, 18,546.19 and 9,736.59

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Solution

The fourth proportional to 12,381.65, 18,546.19 and 9,736.59 is: 14,584.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.65 : 18,546.19 = 9,736.59 : x
  2. Step 2: Convert to fraction form
    12,381.65/18,546.19 = 9,736.59/x
  3. Step 3: Cross multiply
    12,381.65x = 18,546.19 × 9,736.59
  4. Step 4: Simplify right side
    12,381.65x = 180,576,648.09
  5. Step 5: Solve for x
    x = 180,576,648.09/12,381.65
  6. Step 6: Final answer
    x = 14,584.22

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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.