Home / 2,789.12-4,178.88-1,965.92

Finding the Fourth Proportional to 2,789.12, 4,178.88 and 1,965.92

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Solution

The fourth proportional to 2,789.12, 4,178.88 and 1,965.92 is: 2,945.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.12 : 4,178.88 = 1,965.92 : x
  2. Step 2: Convert to fraction form
    2,789.12/4,178.88 = 1,965.92/x
  3. Step 3: Cross multiply
    2,789.12x = 4,178.88 × 1,965.92
  4. Step 4: Simplify right side
    2,789.12x = 8,215,343.77
  5. Step 5: Solve for x
    x = 8,215,343.77/2,789.12
  6. Step 6: Final answer
    x = 2,945.50

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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.