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Finding the Fourth Proportional to 7,079.95, 10,620.11 and 3,958.21

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Solution

The fourth proportional to 7,079.95, 10,620.11 and 3,958.21 is: 5,937.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,079.95 : 10,620.11 = 3,958.21 : x
  2. Step 2: Convert to fraction form
    7,079.95/10,620.11 = 3,958.21/x
  3. Step 3: Cross multiply
    7,079.95x = 10,620.11 × 3,958.21
  4. Step 4: Simplify right side
    7,079.95x = 42,036,625.60
  5. Step 5: Solve for x
    x = 42,036,625.60/7,079.95
  6. Step 6: Final answer
    x = 5,937.42

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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.