Home / 20,703.25-28,571.09-11,272.42

Finding the Fourth Proportional to 20,703.25, 28,571.09 and 11,272.42

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Solution

The fourth proportional to 20,703.25, 28,571.09 and 11,272.42 is: 15,556.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.25 : 28,571.09 = 11,272.42 : x
  2. Step 2: Convert to fraction form
    20,703.25/28,571.09 = 11,272.42/x
  3. Step 3: Cross multiply
    20,703.25x = 28,571.09 × 11,272.42
  4. Step 4: Simplify right side
    20,703.25x = 322,065,326.34
  5. Step 5: Solve for x
    x = 322,065,326.34/20,703.25
  6. Step 6: Final answer
    x = 15,556.27

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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.