Home / 20,552.79-28,362.86-11,121.39

Finding the Fourth Proportional to 20,552.79, 28,362.86 and 11,121.39

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Solution

The fourth proportional to 20,552.79, 28,362.86 and 11,121.39 is: 15,347.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,552.79 : 28,362.86 = 11,121.39 : x
  2. Step 2: Convert to fraction form
    20,552.79/28,362.86 = 11,121.39/x
  3. Step 3: Cross multiply
    20,552.79x = 28,362.86 × 11,121.39
  4. Step 4: Simplify right side
    20,552.79x = 315,434,371.97
  5. Step 5: Solve for x
    x = 315,434,371.97/20,552.79
  6. Step 6: Final answer
    x = 15,347.52

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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.