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Finding the Fourth Proportional to 20,441.84, 28,209.99 and 12,375.39

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Solution

The fourth proportional to 20,441.84, 28,209.99 and 12,375.39 is: 17,078.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,441.84 : 28,209.99 = 12,375.39 : x
  2. Step 2: Convert to fraction form
    20,441.84/28,209.99 = 12,375.39/x
  3. Step 3: Cross multiply
    20,441.84x = 28,209.99 × 12,375.39
  4. Step 4: Simplify right side
    20,441.84x = 349,109,628.15
  5. Step 5: Solve for x
    x = 349,109,628.15/20,441.84
  6. Step 6: Final answer
    x = 17,078.19

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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.