Home / 20,900.11-31,296.63-11,529.71

Finding the Fourth Proportional to 20,900.11, 31,296.63 and 11,529.71

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Solution

The fourth proportional to 20,900.11, 31,296.63 and 11,529.71 is: 17,265.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.11 : 31,296.63 = 11,529.71 : x
  2. Step 2: Convert to fraction form
    20,900.11/31,296.63 = 11,529.71/x
  3. Step 3: Cross multiply
    20,900.11x = 31,296.63 × 11,529.71
  4. Step 4: Simplify right side
    20,900.11x = 360,841,067.88
  5. Step 5: Solve for x
    x = 360,841,067.88/20,900.11
  6. Step 6: Final answer
    x = 17,265.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.