Home / 7,855.28-11,782.16-2,660.88

Finding the Fourth Proportional to 7,855.28, 11,782.16 and 2,660.88

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Solution

The fourth proportional to 7,855.28, 11,782.16 and 2,660.88 is: 3,991.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.28 : 11,782.16 = 2,660.88 : x
  2. Step 2: Convert to fraction form
    7,855.28/11,782.16 = 2,660.88/x
  3. Step 3: Cross multiply
    7,855.28x = 11,782.16 × 2,660.88
  4. Step 4: Simplify right side
    7,855.28x = 31,350,913.90
  5. Step 5: Solve for x
    x = 31,350,913.90/7,855.28
  6. Step 6: Final answer
    x = 3,991.06

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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.