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Finding the Fourth Proportional to 8,425.80, 12,639.30 and 2,582.40

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Solution

The fourth proportional to 8,425.80, 12,639.30 and 2,582.40 is: 3,873.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,425.80 : 12,639.30 = 2,582.40 : x
  2. Step 2: Convert to fraction form
    8,425.80/12,639.30 = 2,582.40/x
  3. Step 3: Cross multiply
    8,425.80x = 12,639.30 × 2,582.40
  4. Step 4: Simplify right side
    8,425.80x = 32,639,728.32
  5. Step 5: Solve for x
    x = 32,639,728.32/8,425.80
  6. Step 6: Final answer
    x = 3,873.78

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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.