Home / 7,391.20-11,099.60-5,215.20

Finding the Fourth Proportional to 7,391.20, 11,099.60 and 5,215.20

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Solution

The fourth proportional to 7,391.20, 11,099.60 and 5,215.20 is: 7,831.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,391.20 : 11,099.60 = 5,215.20 : x
  2. Step 2: Convert to fraction form
    7,391.20/11,099.60 = 5,215.20/x
  3. Step 3: Cross multiply
    7,391.20x = 11,099.60 × 5,215.20
  4. Step 4: Simplify right side
    7,391.20x = 57,886,633.92
  5. Step 5: Solve for x
    x = 57,886,633.92/7,391.20
  6. Step 6: Final answer
    x = 7,831.83

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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.