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Finding the Fourth Proportional to 20,591.88, 30,869.49 and 7,441.32

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Solution

The fourth proportional to 20,591.88, 30,869.49 and 7,441.32 is: 11,155.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.88 : 30,869.49 = 7,441.32 : x
  2. Step 2: Convert to fraction form
    20,591.88/30,869.49 = 7,441.32/x
  3. Step 3: Cross multiply
    20,591.88x = 30,869.49 × 7,441.32
  4. Step 4: Simplify right side
    20,591.88x = 229,709,753.33
  5. Step 5: Solve for x
    x = 229,709,753.33/20,591.88
  6. Step 6: Final answer
    x = 11,155.36

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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.