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Finding the Fourth Proportional to 6,999.18, 9,658.76 and 3,855.38

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Solution

The fourth proportional to 6,999.18, 9,658.76 and 3,855.38 is: 5,320.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.18 : 9,658.76 = 3,855.38 : x
  2. Step 2: Convert to fraction form
    6,999.18/9,658.76 = 3,855.38/x
  3. Step 3: Cross multiply
    6,999.18x = 9,658.76 × 3,855.38
  4. Step 4: Simplify right side
    6,999.18x = 37,238,190.13
  5. Step 5: Solve for x
    x = 37,238,190.13/6,999.18
  6. Step 6: Final answer
    x = 5,320.36

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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.