Home / 20,115.08-27,760.11-11,162.60

Finding the Fourth Proportional to 20,115.08, 27,760.11 and 11,162.60

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Solution

The fourth proportional to 20,115.08, 27,760.11 and 11,162.60 is: 15,405.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.08 : 27,760.11 = 11,162.60 : x
  2. Step 2: Convert to fraction form
    20,115.08/27,760.11 = 11,162.60/x
  3. Step 3: Cross multiply
    20,115.08x = 27,760.11 × 11,162.60
  4. Step 4: Simplify right side
    20,115.08x = 309,875,003.89
  5. Step 5: Solve for x
    x = 309,875,003.89/20,115.08
  6. Step 6: Final answer
    x = 15,405.11

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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.