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Finding the Fourth Proportional to 20,425.21, 30,616.02 and 11,641.21

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Solution

The fourth proportional to 20,425.21, 30,616.02 and 11,641.21 is: 17,449.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.21 : 30,616.02 = 11,641.21 : x
  2. Step 2: Convert to fraction form
    20,425.21/30,616.02 = 11,641.21/x
  3. Step 3: Cross multiply
    20,425.21x = 30,616.02 × 11,641.21
  4. Step 4: Simplify right side
    20,425.21x = 356,407,365.10
  5. Step 5: Solve for x
    x = 356,407,365.10/20,425.21
  6. Step 6: Final answer
    x = 17,449.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.