Home / 20,412.21-28,167.32-11,338.09

Finding the Fourth Proportional to 20,412.21, 28,167.32 and 11,338.09

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Solution

The fourth proportional to 20,412.21, 28,167.32 and 11,338.09 is: 15,645.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.21 : 28,167.32 = 11,338.09 : x
  2. Step 2: Convert to fraction form
    20,412.21/28,167.32 = 11,338.09/x
  3. Step 3: Cross multiply
    20,412.21x = 28,167.32 × 11,338.09
  4. Step 4: Simplify right side
    20,412.21x = 319,363,567.15
  5. Step 5: Solve for x
    x = 319,363,567.15/20,412.21
  6. Step 6: Final answer
    x = 15,645.71

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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.