Home / 9,378.87-12,942.74-5,129.89

Finding the Fourth Proportional to 9,378.87, 12,942.74 and 5,129.89

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Solution

The fourth proportional to 9,378.87, 12,942.74 and 5,129.89 is: 7,079.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.87 : 12,942.74 = 5,129.89 : x
  2. Step 2: Convert to fraction form
    9,378.87/12,942.74 = 5,129.89/x
  3. Step 3: Cross multiply
    9,378.87x = 12,942.74 × 5,129.89
  4. Step 4: Simplify right side
    9,378.87x = 66,394,812.97
  5. Step 5: Solve for x
    x = 66,394,812.97/9,378.87
  6. Step 6: Final answer
    x = 7,079.19

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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.