Home / 20,418.20-28,176.18-11,465.54

Finding the Fourth Proportional to 20,418.20, 28,176.18 and 11,465.54

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Solution

The fourth proportional to 20,418.20, 28,176.18 and 11,465.54 is: 15,821.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.20 : 28,176.18 = 11,465.54 : x
  2. Step 2: Convert to fraction form
    20,418.20/28,176.18 = 11,465.54/x
  3. Step 3: Cross multiply
    20,418.20x = 28,176.18 × 11,465.54
  4. Step 4: Simplify right side
    20,418.20x = 323,055,118.84
  5. Step 5: Solve for x
    x = 323,055,118.84/20,418.20
  6. Step 6: Final answer
    x = 15,821.92

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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.