Home / 15,489.41-21,375.33-8,415.77

Finding the Fourth Proportional to 15,489.41, 21,375.33 and 8,415.77

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Solution

The fourth proportional to 15,489.41, 21,375.33 and 8,415.77 is: 11,613.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.41 : 21,375.33 = 8,415.77 : x
  2. Step 2: Convert to fraction form
    15,489.41/21,375.33 = 8,415.77/x
  3. Step 3: Cross multiply
    15,489.41x = 21,375.33 × 8,415.77
  4. Step 4: Simplify right side
    15,489.41x = 179,889,860.95
  5. Step 5: Solve for x
    x = 179,889,860.95/15,489.41
  6. Step 6: Final answer
    x = 11,613.73

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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.