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Finding the Fourth Proportional to 8,580.75, 12,871.13 and 3,386.63

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Solution

The fourth proportional to 8,580.75, 12,871.13 and 3,386.63 is: 5,079.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,580.75 : 12,871.13 = 3,386.63 : x
  2. Step 2: Convert to fraction form
    8,580.75/12,871.13 = 3,386.63/x
  3. Step 3: Cross multiply
    8,580.75x = 12,871.13 × 3,386.63
  4. Step 4: Simplify right side
    8,580.75x = 43,589,673.70
  5. Step 5: Solve for x
    x = 43,589,673.70/8,580.75
  6. Step 6: Final answer
    x = 5,079.94

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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.