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Finding the Fourth Proportional to 8,982.84, 13,480.42 and 3,139.44

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Solution

The fourth proportional to 8,982.84, 13,480.42 and 3,139.44 is: 4,711.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,982.84 : 13,480.42 = 3,139.44 : x
  2. Step 2: Convert to fraction form
    8,982.84/13,480.42 = 3,139.44/x
  3. Step 3: Cross multiply
    8,982.84x = 13,480.42 × 3,139.44
  4. Step 4: Simplify right side
    8,982.84x = 42,320,969.76
  5. Step 5: Solve for x
    x = 42,320,969.76/8,982.84
  6. Step 6: Final answer
    x = 4,711.31

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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.