Home / 9,379.20-12,942.36-5,187.18

Finding the Fourth Proportional to 9,379.20, 12,942.36 and 5,187.18

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Solution

The fourth proportional to 9,379.20, 12,942.36 and 5,187.18 is: 7,157.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,379.20 : 12,942.36 = 5,187.18 : x
  2. Step 2: Convert to fraction form
    9,379.20/12,942.36 = 5,187.18/x
  3. Step 3: Cross multiply
    9,379.20x = 12,942.36 × 5,187.18
  4. Step 4: Simplify right side
    9,379.20x = 67,134,350.94
  5. Step 5: Solve for x
    x = 67,134,350.94/9,379.20
  6. Step 6: Final answer
    x = 7,157.79

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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.