Home / 20,552.67-28,362.69-11,121.21

Finding the Fourth Proportional to 20,552.67, 28,362.69 and 11,121.21

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Solution

The fourth proportional to 20,552.67, 28,362.69 and 11,121.21 is: 15,347.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,552.67 : 28,362.69 = 11,121.21 : x
  2. Step 2: Convert to fraction form
    20,552.67/28,362.69 = 11,121.21/x
  3. Step 3: Cross multiply
    20,552.67x = 28,362.69 × 11,121.21
  4. Step 4: Simplify right side
    20,552.67x = 315,427,431.65
  5. Step 5: Solve for x
    x = 315,427,431.65/20,552.67
  6. Step 6: Final answer
    x = 15,347.27

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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.