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Finding the Fourth Proportional to 20,562.46, 30,843.79 and 7,405.43

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Solution

The fourth proportional to 20,562.46, 30,843.79 and 7,405.43 is: 11,108.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.46 : 30,843.79 = 7,405.43 : x
  2. Step 2: Convert to fraction form
    20,562.46/30,843.79 = 7,405.43/x
  3. Step 3: Cross multiply
    20,562.46x = 30,843.79 × 7,405.43
  4. Step 4: Simplify right side
    20,562.46x = 228,411,355.05
  5. Step 5: Solve for x
    x = 228,411,355.05/20,562.46
  6. Step 6: Final answer
    x = 11,108.17

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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.