Home / 8,639.87-12,959.65-2,796.47

Finding the Fourth Proportional to 8,639.87, 12,959.65 and 2,796.47

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Solution

The fourth proportional to 8,639.87, 12,959.65 and 2,796.47 is: 4,194.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.87 : 12,959.65 = 2,796.47 : x
  2. Step 2: Convert to fraction form
    8,639.87/12,959.65 = 2,796.47/x
  3. Step 3: Cross multiply
    8,639.87x = 12,959.65 × 2,796.47
  4. Step 4: Simplify right side
    8,639.87x = 36,241,316.90
  5. Step 5: Solve for x
    x = 36,241,316.90/8,639.87
  6. Step 6: Final answer
    x = 4,194.66

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1.5x scale

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.