Home / 7,471.28-11,205.81-2,790.71

Finding the Fourth Proportional to 7,471.28, 11,205.81 and 2,790.71

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Solution

The fourth proportional to 7,471.28, 11,205.81 and 2,790.71 is: 4,185.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,471.28 : 11,205.81 = 2,790.71 : x
  2. Step 2: Convert to fraction form
    7,471.28/11,205.81 = 2,790.71/x
  3. Step 3: Cross multiply
    7,471.28x = 11,205.81 × 2,790.71
  4. Step 4: Simplify right side
    7,471.28x = 31,272,110.00
  5. Step 5: Solve for x
    x = 31,272,110.00/7,471.28
  6. Step 6: Final answer
    x = 4,185.64

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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.