Home / 8,639.79-12,961.73-2,796.40

Finding the Fourth Proportional to 8,639.79, 12,961.73 and 2,796.40

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Solution

The fourth proportional to 8,639.79, 12,961.73 and 2,796.40 is: 4,195.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.79 : 12,961.73 = 2,796.40 : x
  2. Step 2: Convert to fraction form
    8,639.79/12,961.73 = 2,796.40/x
  3. Step 3: Cross multiply
    8,639.79x = 12,961.73 × 2,796.40
  4. Step 4: Simplify right side
    8,639.79x = 36,246,172.44
  5. Step 5: Solve for x
    x = 36,246,172.44/8,639.79
  6. Step 6: Final answer
    x = 4,195.26

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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.