Home / 11,529.12-15,909.84-8,398.56

Finding the Fourth Proportional to 11,529.12, 15,909.84 and 8,398.56

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Solution

The fourth proportional to 11,529.12, 15,909.84 and 8,398.56 is: 11,589.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,529.12 : 15,909.84 = 8,398.56 : x
  2. Step 2: Convert to fraction form
    11,529.12/15,909.84 = 8,398.56/x
  3. Step 3: Cross multiply
    11,529.12x = 15,909.84 × 8,398.56
  4. Step 4: Simplify right side
    11,529.12x = 133,619,745.83
  5. Step 5: Solve for x
    x = 133,619,745.83/11,529.12
  6. Step 6: Final answer
    x = 11,589.76

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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.