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Finding the Fourth Proportional to 28,065.78, 42,098.67 and 8,344.31

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Solution

The fourth proportional to 28,065.78, 42,098.67 and 8,344.31 is: 12,516.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.78 : 42,098.67 = 8,344.31 : x
  2. Step 2: Convert to fraction form
    28,065.78/42,098.67 = 8,344.31/x
  3. Step 3: Cross multiply
    28,065.78x = 42,098.67 × 8,344.31
  4. Step 4: Simplify right side
    28,065.78x = 351,284,142.57
  5. Step 5: Solve for x
    x = 351,284,142.57/28,065.78
  6. Step 6: Final answer
    x = 12,516.46

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Double scale
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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.