Home / 20,649.82-28,496.72-11,218.40

Finding the Fourth Proportional to 20,649.82, 28,496.72 and 11,218.40

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Solution

The fourth proportional to 20,649.82, 28,496.72 and 11,218.40 is: 15,481.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.82 : 28,496.72 = 11,218.40 : x
  2. Step 2: Convert to fraction form
    20,649.82/28,496.72 = 11,218.40/x
  3. Step 3: Cross multiply
    20,649.82x = 28,496.72 × 11,218.40
  4. Step 4: Simplify right side
    20,649.82x = 319,687,603.65
  5. Step 5: Solve for x
    x = 319,687,603.65/20,649.82
  6. Step 6: Final answer
    x = 15,481.37

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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.