Home / 28,649.36-42,976.11-11,992.61

Finding the Fourth Proportional to 28,649.36, 42,976.11 and 11,992.61

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Solution

The fourth proportional to 28,649.36, 42,976.11 and 11,992.61 is: 17,989.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,649.36 : 42,976.11 = 11,992.61 : x
  2. Step 2: Convert to fraction form
    28,649.36/42,976.11 = 11,992.61/x
  3. Step 3: Cross multiply
    28,649.36x = 42,976.11 × 11,992.61
  4. Step 4: Simplify right side
    28,649.36x = 515,395,726.55
  5. Step 5: Solve for x
    x = 515,395,726.55/28,649.36
  6. Step 6: Final answer
    x = 17,989.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.