Home / 7,801.20-11,686.68-3,908.88

Finding the Fourth Proportional to 7,801.20, 11,686.68 and 3,908.88

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Solution

The fourth proportional to 7,801.20, 11,686.68 and 3,908.88 is: 5,855.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,801.20 : 11,686.68 = 3,908.88 : x
  2. Step 2: Convert to fraction form
    7,801.20/11,686.68 = 3,908.88/x
  3. Step 3: Cross multiply
    7,801.20x = 11,686.68 × 3,908.88
  4. Step 4: Simplify right side
    7,801.20x = 45,681,829.72
  5. Step 5: Solve for x
    x = 45,681,829.72/7,801.20
  6. Step 6: Final answer
    x = 5,855.74

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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.