Home / 10,909.24-15,064.38-8,109.88

Finding the Fourth Proportional to 10,909.24, 15,064.38 and 8,109.88

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Solution

The fourth proportional to 10,909.24, 15,064.38 and 8,109.88 is: 11,198.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,909.24 : 15,064.38 = 8,109.88 : x
  2. Step 2: Convert to fraction form
    10,909.24/15,064.38 = 8,109.88/x
  3. Step 3: Cross multiply
    10,909.24x = 15,064.38 × 8,109.88
  4. Step 4: Simplify right side
    10,909.24x = 122,170,314.07
  5. Step 5: Solve for x
    x = 122,170,314.07/10,909.24
  6. Step 6: Final answer
    x = 11,198.79

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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.