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Finding the Fourth Proportional to 43,809.10, 65,658.75 and 18,819.46

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Solution

The fourth proportional to 43,809.10, 65,658.75 and 18,819.46 is: 28,205.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,809.10 : 65,658.75 = 18,819.46 : x
  2. Step 2: Convert to fraction form
    43,809.10/65,658.75 = 18,819.46/x
  3. Step 3: Cross multiply
    43,809.10x = 65,658.75 × 18,819.46
  4. Step 4: Simplify right side
    43,809.10x = 1,235,662,219.28
  5. Step 5: Solve for x
    x = 1,235,662,219.28/43,809.10
  6. Step 6: Final answer
    x = 28,205.61

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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.