Home / 20,550.78-28,360.13-11,119.34

Finding the Fourth Proportional to 20,550.78, 28,360.13 and 11,119.34

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Solution

The fourth proportional to 20,550.78, 28,360.13 and 11,119.34 is: 15,344.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.78 : 28,360.13 = 11,119.34 : x
  2. Step 2: Convert to fraction form
    20,550.78/28,360.13 = 11,119.34/x
  3. Step 3: Cross multiply
    20,550.78x = 28,360.13 × 11,119.34
  4. Step 4: Simplify right side
    20,550.78x = 315,345,943.22
  5. Step 5: Solve for x
    x = 315,345,943.22/20,550.78
  6. Step 6: Final answer
    x = 15,344.72

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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.