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Finding the Fourth Proportional to 7,338.15, 10,987.79 and 3,868.11

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Solution

The fourth proportional to 7,338.15, 10,987.79 and 3,868.11 is: 5,791.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,338.15 : 10,987.79 = 3,868.11 : x
  2. Step 2: Convert to fraction form
    7,338.15/10,987.79 = 3,868.11/x
  3. Step 3: Cross multiply
    7,338.15x = 10,987.79 × 3,868.11
  4. Step 4: Simplify right side
    7,338.15x = 42,501,961.04
  5. Step 5: Solve for x
    x = 42,501,961.04/7,338.15
  6. Step 6: Final answer
    x = 5,791.92

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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.