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Finding the Fourth Proportional to 8,671.60, 13,004.20 and 2,828.40

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Solution

The fourth proportional to 8,671.60, 13,004.20 and 2,828.40 is: 4,241.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.60 : 13,004.20 = 2,828.40 : x
  2. Step 2: Convert to fraction form
    8,671.60/13,004.20 = 2,828.40/x
  3. Step 3: Cross multiply
    8,671.60x = 13,004.20 × 2,828.40
  4. Step 4: Simplify right side
    8,671.60x = 36,781,079.28
  5. Step 5: Solve for x
    x = 36,781,079.28/8,671.60
  6. Step 6: Final answer
    x = 4,241.56

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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.