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Finding the Fourth Proportional to 20,954.97, 28,914.60 and 12,453.93

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Solution

The fourth proportional to 20,954.97, 28,914.60 and 12,453.93 is: 17,184.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.97 : 28,914.60 = 12,453.93 : x
  2. Step 2: Convert to fraction form
    20,954.97/28,914.60 = 12,453.93/x
  3. Step 3: Cross multiply
    20,954.97x = 28,914.60 × 12,453.93
  4. Step 4: Simplify right side
    20,954.97x = 360,100,404.38
  5. Step 5: Solve for x
    x = 360,100,404.38/20,954.97
  6. Step 6: Final answer
    x = 17,184.49

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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.