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Finding the Fourth Proportional to 7,919.10, 11,880.81 and 2,654.98

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Solution

The fourth proportional to 7,919.10, 11,880.81 and 2,654.98 is: 3,983.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.10 : 11,880.81 = 2,654.98 : x
  2. Step 2: Convert to fraction form
    7,919.10/11,880.81 = 2,654.98/x
  3. Step 3: Cross multiply
    7,919.10x = 11,880.81 × 2,654.98
  4. Step 4: Simplify right side
    7,919.10x = 31,543,283.23
  5. Step 5: Solve for x
    x = 31,543,283.23/7,919.10
  6. Step 6: Final answer
    x = 3,983.19

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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.