Home / 8,639.88-12,959.73-3,958.56

Finding the Fourth Proportional to 8,639.88, 12,959.73 and 3,958.56

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Solution

The fourth proportional to 8,639.88, 12,959.73 and 3,958.56 is: 5,937.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.88 : 12,959.73 = 3,958.56 : x
  2. Step 2: Convert to fraction form
    8,639.88/12,959.73 = 3,958.56/x
  3. Step 3: Cross multiply
    8,639.88x = 12,959.73 × 3,958.56
  4. Step 4: Simplify right side
    8,639.88x = 51,301,784.20
  5. Step 5: Solve for x
    x = 51,301,784.20/8,639.88
  6. Step 6: Final answer
    x = 5,937.79

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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.