Home / 20,642.48-28,488.21-11,691.34

Finding the Fourth Proportional to 20,642.48, 28,488.21 and 11,691.34

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Solution

The fourth proportional to 20,642.48, 28,488.21 and 11,691.34 is: 16,134.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.48 : 28,488.21 = 11,691.34 : x
  2. Step 2: Convert to fraction form
    20,642.48/28,488.21 = 11,691.34/x
  3. Step 3: Cross multiply
    20,642.48x = 28,488.21 × 11,691.34
  4. Step 4: Simplify right side
    20,642.48x = 333,065,234.04
  5. Step 5: Solve for x
    x = 333,065,234.04/20,642.48
  6. Step 6: Final answer
    x = 16,134.94

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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.