Home / 20,642.23-28,488.14-11,691.91

Finding the Fourth Proportional to 20,642.23, 28,488.14 and 11,691.91

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Solution

The fourth proportional to 20,642.23, 28,488.14 and 11,691.91 is: 16,135.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.23 : 28,488.14 = 11,691.91 : x
  2. Step 2: Convert to fraction form
    20,642.23/28,488.14 = 11,691.91/x
  3. Step 3: Cross multiply
    20,642.23x = 28,488.14 × 11,691.91
  4. Step 4: Simplify right side
    20,642.23x = 333,080,768.95
  5. Step 5: Solve for x
    x = 333,080,768.95/20,642.23
  6. Step 6: Final answer
    x = 16,135.89

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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.