Home / 20,648.82-28,495.32-11,217.42

Finding the Fourth Proportional to 20,648.82, 28,495.32 and 11,217.42

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Solution

The fourth proportional to 20,648.82, 28,495.32 and 11,217.42 is: 15,480.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.82 : 28,495.32 = 11,217.42 : x
  2. Step 2: Convert to fraction form
    20,648.82/28,495.32 = 11,217.42/x
  3. Step 3: Cross multiply
    20,648.82x = 28,495.32 × 11,217.42
  4. Step 4: Simplify right side
    20,648.82x = 319,643,972.47
  5. Step 5: Solve for x
    x = 319,643,972.47/20,648.82
  6. Step 6: Final answer
    x = 15,480.01

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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.