Home / 8,439.12-11,635.11-6,921.09

Finding the Fourth Proportional to 8,439.12, 11,635.11 and 6,921.09

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Solution

The fourth proportional to 8,439.12, 11,635.11 and 6,921.09 is: 9,542.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.12 : 11,635.11 = 6,921.09 : x
  2. Step 2: Convert to fraction form
    8,439.12/11,635.11 = 6,921.09/x
  3. Step 3: Cross multiply
    8,439.12x = 11,635.11 × 6,921.09
  4. Step 4: Simplify right side
    8,439.12x = 80,527,643.47
  5. Step 5: Solve for x
    x = 80,527,643.47/8,439.12
  6. Step 6: Final answer
    x = 9,542.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.