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Finding the Fourth Proportional to 7,671.11, 11,500.79 and 2,990.42

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Solution

The fourth proportional to 7,671.11, 11,500.79 and 2,990.42 is: 4,483.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,671.11 : 11,500.79 = 2,990.42 : x
  2. Step 2: Convert to fraction form
    7,671.11/11,500.79 = 2,990.42/x
  3. Step 3: Cross multiply
    7,671.11x = 11,500.79 × 2,990.42
  4. Step 4: Simplify right side
    7,671.11x = 34,392,163.10
  5. Step 5: Solve for x
    x = 34,392,163.10/7,671.11
  6. Step 6: Final answer
    x = 4,483.34

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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.