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Finding the Fourth Proportional to 7,472.68, 11,205.30 and 2,790.68

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Solution

The fourth proportional to 7,472.68, 11,205.30 and 2,790.68 is: 4,184.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,472.68 : 11,205.30 = 2,790.68 : x
  2. Step 2: Convert to fraction form
    7,472.68/11,205.30 = 2,790.68/x
  3. Step 3: Cross multiply
    7,472.68x = 11,205.30 × 2,790.68
  4. Step 4: Simplify right side
    7,472.68x = 31,270,406.60
  5. Step 5: Solve for x
    x = 31,270,406.60/7,472.68
  6. Step 6: Final answer
    x = 4,184.63

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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.