Home / 20,643.90-28,487.52-11,212.44

Finding the Fourth Proportional to 20,643.90, 28,487.52 and 11,212.44

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Solution

The fourth proportional to 20,643.90, 28,487.52 and 11,212.44 is: 15,472.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.90 : 28,487.52 = 11,212.44 : x
  2. Step 2: Convert to fraction form
    20,643.90/28,487.52 = 11,212.44/x
  3. Step 3: Cross multiply
    20,643.90x = 28,487.52 × 11,212.44
  4. Step 4: Simplify right side
    20,643.90x = 319,414,608.75
  5. Step 5: Solve for x
    x = 319,414,608.75/20,643.90
  6. Step 6: Final answer
    x = 15,472.59

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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.