Home / 20,107.89-27,739.78-12,556.11

Finding the Fourth Proportional to 20,107.89, 27,739.78 and 12,556.11

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Solution

The fourth proportional to 20,107.89, 27,739.78 and 12,556.11 is: 17,321.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.89 : 27,739.78 = 12,556.11 : x
  2. Step 2: Convert to fraction form
    20,107.89/27,739.78 = 12,556.11/x
  3. Step 3: Cross multiply
    20,107.89x = 27,739.78 × 12,556.11
  4. Step 4: Simplify right side
    20,107.89x = 348,303,729.06
  5. Step 5: Solve for x
    x = 348,303,729.06/20,107.89
  6. Step 6: Final answer
    x = 17,321.74

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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.