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Finding the Fourth Proportional to 5,909.96, 8,865.90 and 1,805

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Solution

The fourth proportional to 5,909.96, 8,865.90 and 1,805 is: 2,707.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,909.96 : 8,865.90 = 1,805 : x
  2. Step 2: Convert to fraction form
    5,909.96/8,865.90 = 1,805/x
  3. Step 3: Cross multiply
    5,909.96x = 8,865.90 × 1,805
  4. Step 4: Simplify right side
    5,909.96x = 16,002,949.50
  5. Step 5: Solve for x
    x = 16,002,949.50/5,909.96
  6. Step 6: Final answer
    x = 2,707.79

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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.