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Finding the Fourth Proportional to 7,134.67, 9,845.88 and 3,990.86

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Solution

The fourth proportional to 7,134.67, 9,845.88 and 3,990.86 is: 5,507.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,134.67 : 9,845.88 = 3,990.86 : x
  2. Step 2: Convert to fraction form
    7,134.67/9,845.88 = 3,990.86/x
  3. Step 3: Cross multiply
    7,134.67x = 9,845.88 × 3,990.86
  4. Step 4: Simplify right side
    7,134.67x = 39,293,528.66
  5. Step 5: Solve for x
    x = 39,293,528.66/7,134.67
  6. Step 6: Final answer
    x = 5,507.41

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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.