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Finding the Fourth Proportional to 7,863.42, 11,795.90 and 2,931.90

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Solution

The fourth proportional to 7,863.42, 11,795.90 and 2,931.90 is: 4,398.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,863.42 : 11,795.90 = 2,931.90 : x
  2. Step 2: Convert to fraction form
    7,863.42/11,795.90 = 2,931.90/x
  3. Step 3: Cross multiply
    7,863.42x = 11,795.90 × 2,931.90
  4. Step 4: Simplify right side
    7,863.42x = 34,584,399.21
  5. Step 5: Solve for x
    x = 34,584,399.21/7,863.42
  6. Step 6: Final answer
    x = 4,398.14

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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.