Home / 20,115.24-27,749.70-12,556.68

Finding the Fourth Proportional to 20,115.24, 27,749.70 and 12,556.68

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Solution

The fourth proportional to 20,115.24, 27,749.70 and 12,556.68 is: 17,322.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.24 : 27,749.70 = 12,556.68 : x
  2. Step 2: Convert to fraction form
    20,115.24/27,749.70 = 12,556.68/x
  3. Step 3: Cross multiply
    20,115.24x = 27,749.70 × 12,556.68
  4. Step 4: Simplify right side
    20,115.24x = 348,444,103.00
  5. Step 5: Solve for x
    x = 348,444,103.00/20,115.24
  6. Step 6: Final answer
    x = 17,322.39

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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.