Home / 20,418.44-28,176.54-11,465.78

Finding the Fourth Proportional to 20,418.44, 28,176.54 and 11,465.78

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Solution

The fourth proportional to 20,418.44, 28,176.54 and 11,465.78 is: 15,822.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.44 : 28,176.54 = 11,465.78 : x
  2. Step 2: Convert to fraction form
    20,418.44/28,176.54 = 11,465.78/x
  3. Step 3: Cross multiply
    20,418.44x = 28,176.54 × 11,465.78
  4. Step 4: Simplify right side
    20,418.44x = 323,066,008.80
  5. Step 5: Solve for x
    x = 323,066,008.80/20,418.44
  6. Step 6: Final answer
    x = 15,822.27

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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.