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Finding the Fourth Proportional to 7,338.80, 10,986.60 and 6,911.60

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Solution

The fourth proportional to 7,338.80, 10,986.60 and 6,911.60 is: 10,347.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,338.80 : 10,986.60 = 6,911.60 : x
  2. Step 2: Convert to fraction form
    7,338.80/10,986.60 = 6,911.60/x
  3. Step 3: Cross multiply
    7,338.80x = 10,986.60 × 6,911.60
  4. Step 4: Simplify right side
    7,338.80x = 75,934,984.56
  5. Step 5: Solve for x
    x = 75,934,984.56/7,338.80
  6. Step 6: Final answer
    x = 10,347.06

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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.