Home / 20,650.20-28,497.31-11,218.77

Finding the Fourth Proportional to 20,650.20, 28,497.31 and 11,218.77

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Solution

The fourth proportional to 20,650.20, 28,497.31 and 11,218.77 is: 15,481.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.20 : 28,497.31 = 11,218.77 : x
  2. Step 2: Convert to fraction form
    20,650.20/28,497.31 = 11,218.77/x
  3. Step 3: Cross multiply
    20,650.20x = 28,497.31 × 11,218.77
  4. Step 4: Simplify right side
    20,650.20x = 319,704,766.51
  5. Step 5: Solve for x
    x = 319,704,766.51/20,650.20
  6. Step 6: Final answer
    x = 15,481.92

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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.