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Finding the Fourth Proportional to 6,999.43, 9,658.86 and 3,855.55

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Solution

The fourth proportional to 6,999.43, 9,658.86 and 3,855.55 is: 5,320.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.43 : 9,658.86 = 3,855.55 : x
  2. Step 2: Convert to fraction form
    6,999.43/9,658.86 = 3,855.55/x
  3. Step 3: Cross multiply
    6,999.43x = 9,658.86 × 3,855.55
  4. Step 4: Simplify right side
    6,999.43x = 37,240,217.67
  5. Step 5: Solve for x
    x = 37,240,217.67/6,999.43
  6. Step 6: Final answer
    x = 5,320.46

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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.