Home / 21,012.91-28,997.83-11,452.80

Finding the Fourth Proportional to 21,012.91, 28,997.83 and 11,452.80

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Solution

The fourth proportional to 21,012.91, 28,997.83 and 11,452.80 is: 15,804.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.91 : 28,997.83 = 11,452.80 : x
  2. Step 2: Convert to fraction form
    21,012.91/28,997.83 = 11,452.80/x
  3. Step 3: Cross multiply
    21,012.91x = 28,997.83 × 11,452.80
  4. Step 4: Simplify right side
    21,012.91x = 332,106,290.16
  5. Step 5: Solve for x
    x = 332,106,290.16/21,012.91
  6. Step 6: Final answer
    x = 15,804.87

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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.