Home / 20,552.80-28,362.76-11,121.32

Finding the Fourth Proportional to 20,552.80, 28,362.76 and 11,121.32

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Solution

The fourth proportional to 20,552.80, 28,362.76 and 11,121.32 is: 15,347.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,552.80 : 28,362.76 = 11,121.32 : x
  2. Step 2: Convert to fraction form
    20,552.80/28,362.76 = 11,121.32/x
  3. Step 3: Cross multiply
    20,552.80x = 28,362.76 × 11,121.32
  4. Step 4: Simplify right side
    20,552.80x = 315,431,330.04
  5. Step 5: Solve for x
    x = 315,431,330.04/20,552.80
  6. Step 6: Final answer
    x = 15,347.37

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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.