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Finding the Fourth Proportional to 6,629.79, 9,149.13 and 3,645.81

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Solution

The fourth proportional to 6,629.79, 9,149.13 and 3,645.81 is: 5,031.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,629.79 : 9,149.13 = 3,645.81 : x
  2. Step 2: Convert to fraction form
    6,629.79/9,149.13 = 3,645.81/x
  3. Step 3: Cross multiply
    6,629.79x = 9,149.13 × 3,645.81
  4. Step 4: Simplify right side
    6,629.79x = 33,355,989.65
  5. Step 5: Solve for x
    x = 33,355,989.65/6,629.79
  6. Step 6: Final answer
    x = 5,031.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.