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Finding the Fourth Proportional to 8,689.64, 13,034.20 and 2,115.73

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Solution

The fourth proportional to 8,689.64, 13,034.20 and 2,115.73 is: 3,173.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.64 : 13,034.20 = 2,115.73 : x
  2. Step 2: Convert to fraction form
    8,689.64/13,034.20 = 2,115.73/x
  3. Step 3: Cross multiply
    8,689.64x = 13,034.20 × 2,115.73
  4. Step 4: Simplify right side
    8,689.64x = 27,576,835.20
  5. Step 5: Solve for x
    x = 27,576,835.20/8,689.64
  6. Step 6: Final answer
    x = 3,173.53

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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.