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Finding the Fourth Proportional to 12,326.40, 18,489.60 and 10,576.80

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Solution

The fourth proportional to 12,326.40, 18,489.60 and 10,576.80 is: 15,865.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,326.40 : 18,489.60 = 10,576.80 : x
  2. Step 2: Convert to fraction form
    12,326.40/18,489.60 = 10,576.80/x
  3. Step 3: Cross multiply
    12,326.40x = 18,489.60 × 10,576.80
  4. Step 4: Simplify right side
    12,326.40x = 195,560,801.28
  5. Step 5: Solve for x
    x = 195,560,801.28/12,326.40
  6. Step 6: Final answer
    x = 15,865.20

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Similar ratio
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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.