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Finding the Fourth Proportional to 20,441.80, 30,644.22 and 7,291.11

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Solution

The fourth proportional to 20,441.80, 30,644.22 and 7,291.11 is: 10,930.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,441.80 : 30,644.22 = 7,291.11 : x
  2. Step 2: Convert to fraction form
    20,441.80/30,644.22 = 7,291.11/x
  3. Step 3: Cross multiply
    20,441.80x = 30,644.22 × 7,291.11
  4. Step 4: Simplify right side
    20,441.80x = 223,430,521.14
  5. Step 5: Solve for x
    x = 223,430,521.14/20,441.80
  6. Step 6: Final answer
    x = 10,930.08

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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.