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Finding the Fourth Proportional to 43,813.50, 65,767.05 and 18,865.91

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Solution

The fourth proportional to 43,813.50, 65,767.05 and 18,865.91 is: 28,319.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,813.50 : 65,767.05 = 18,865.91 : x
  2. Step 2: Convert to fraction form
    43,813.50/65,767.05 = 18,865.91/x
  3. Step 3: Cross multiply
    43,813.50x = 65,767.05 × 18,865.91
  4. Step 4: Simplify right side
    43,813.50x = 1,240,754,917.43
  5. Step 5: Solve for x
    x = 1,240,754,917.43/43,813.50
  6. Step 6: Final answer
    x = 28,319.01

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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.