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Finding the Fourth Proportional to 20,563.27, 28,425.14 and 18,347.11

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Solution

The fourth proportional to 20,563.27, 28,425.14 and 18,347.11 is: 25,361.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.27 : 28,425.14 = 18,347.11 : x
  2. Step 2: Convert to fraction form
    20,563.27/28,425.14 = 18,347.11/x
  3. Step 3: Cross multiply
    20,563.27x = 28,425.14 × 18,347.11
  4. Step 4: Simplify right side
    20,563.27x = 521,519,170.35
  5. Step 5: Solve for x
    x = 521,519,170.35/20,563.27
  6. Step 6: Final answer
    x = 25,361.68

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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.