Home / 20,481.19-28,262.24-11,405.87

Finding the Fourth Proportional to 20,481.19, 28,262.24 and 11,405.87

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Solution

The fourth proportional to 20,481.19, 28,262.24 and 11,405.87 is: 15,739.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.19 : 28,262.24 = 11,405.87 : x
  2. Step 2: Convert to fraction form
    20,481.19/28,262.24 = 11,405.87/x
  3. Step 3: Cross multiply
    20,481.19x = 28,262.24 × 11,405.87
  4. Step 4: Simplify right side
    20,481.19x = 322,355,385.76
  5. Step 5: Solve for x
    x = 322,355,385.76/20,481.19
  6. Step 6: Final answer
    x = 15,739.10

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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.