Home / 11,189.88-15,438.03-6,408.55

Finding the Fourth Proportional to 11,189.88, 15,438.03 and 6,408.55

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Solution

The fourth proportional to 11,189.88, 15,438.03 and 6,408.55 is: 8,841.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,189.88 : 15,438.03 = 6,408.55 : x
  2. Step 2: Convert to fraction form
    11,189.88/15,438.03 = 6,408.55/x
  3. Step 3: Cross multiply
    11,189.88x = 15,438.03 × 6,408.55
  4. Step 4: Simplify right side
    11,189.88x = 98,935,382.42
  5. Step 5: Solve for x
    x = 98,935,382.42/11,189.88
  6. Step 6: Final answer
    x = 8,841.51

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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.