Home / 20,722.24-28,596.68-11,290.80

Finding the Fourth Proportional to 20,722.24, 28,596.68 and 11,290.80

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Solution

The fourth proportional to 20,722.24, 28,596.68 and 11,290.80 is: 15,581.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.24 : 28,596.68 = 11,290.80 : x
  2. Step 2: Convert to fraction form
    20,722.24/28,596.68 = 11,290.80/x
  3. Step 3: Cross multiply
    20,722.24x = 28,596.68 × 11,290.80
  4. Step 4: Simplify right side
    20,722.24x = 322,879,394.54
  5. Step 5: Solve for x
    x = 322,879,394.54/20,722.24
  6. Step 6: Final answer
    x = 15,581.30

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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.