Home / 20,703.90-28,571.76-11,272.62

Finding the Fourth Proportional to 20,703.90, 28,571.76 and 11,272.62

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Solution

The fourth proportional to 20,703.90, 28,571.76 and 11,272.62 is: 15,556.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.90 : 28,571.76 = 11,272.62 : x
  2. Step 2: Convert to fraction form
    20,703.90/28,571.76 = 11,272.62/x
  3. Step 3: Cross multiply
    20,703.90x = 28,571.76 × 11,272.62
  4. Step 4: Simplify right side
    20,703.90x = 322,078,593.21
  5. Step 5: Solve for x
    x = 322,078,593.21/20,703.90
  6. Step 6: Final answer
    x = 15,556.42

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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.