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Finding the Fourth Proportional to 8,465.20, 12,698.20 and 2,625.90

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Solution

The fourth proportional to 8,465.20, 12,698.20 and 2,625.90 is: 3,938.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,465.20 : 12,698.20 = 2,625.90 : x
  2. Step 2: Convert to fraction form
    8,465.20/12,698.20 = 2,625.90/x
  3. Step 3: Cross multiply
    8,465.20x = 12,698.20 × 2,625.90
  4. Step 4: Simplify right side
    8,465.20x = 33,344,203.38
  5. Step 5: Solve for x
    x = 33,344,203.38/8,465.20
  6. Step 6: Final answer
    x = 3,938.97

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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.