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Finding the Fourth Proportional to 8,427, 12,640.46 and 2,187.01

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Solution

The fourth proportional to 8,427, 12,640.46 and 2,187.01 is: 3,280.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,427 : 12,640.46 = 2,187.01 : x
  2. Step 2: Convert to fraction form
    8,427/12,640.46 = 2,187.01/x
  3. Step 3: Cross multiply
    8,427x = 12,640.46 × 2,187.01
  4. Step 4: Simplify right side
    8,427x = 27,644,769.89
  5. Step 5: Solve for x
    x = 27,644,769.89/8,427
  6. Step 6: Final answer
    x = 3,280.50

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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.