Home / 20,758.30-28,646.31-11,326.66

Finding the Fourth Proportional to 20,758.30, 28,646.31 and 11,326.66

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Solution

The fourth proportional to 20,758.30, 28,646.31 and 11,326.66 is: 15,630.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.30 : 28,646.31 = 11,326.66 : x
  2. Step 2: Convert to fraction form
    20,758.30/28,646.31 = 11,326.66/x
  3. Step 3: Cross multiply
    20,758.30x = 28,646.31 × 11,326.66
  4. Step 4: Simplify right side
    20,758.30x = 324,467,013.62
  5. Step 5: Solve for x
    x = 324,467,013.62/20,758.30
  6. Step 6: Final answer
    x = 15,630.71

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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.