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Finding the Fourth Proportional to 7,909.38, 11,859.21 and 3,749.22

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Solution

The fourth proportional to 7,909.38, 11,859.21 and 3,749.22 is: 5,621.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.38 : 11,859.21 = 3,749.22 : x
  2. Step 2: Convert to fraction form
    7,909.38/11,859.21 = 3,749.22/x
  3. Step 3: Cross multiply
    7,909.38x = 11,859.21 × 3,749.22
  4. Step 4: Simplify right side
    7,909.38x = 44,462,787.32
  5. Step 5: Solve for x
    x = 44,462,787.32/7,909.38
  6. Step 6: Final answer
    x = 5,621.53

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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.