Home / 7,429.80-11,142.54-2,811.72

Finding the Fourth Proportional to 7,429.80, 11,142.54 and 2,811.72

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Solution

The fourth proportional to 7,429.80, 11,142.54 and 2,811.72 is: 4,216.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,429.80 : 11,142.54 = 2,811.72 : x
  2. Step 2: Convert to fraction form
    7,429.80/11,142.54 = 2,811.72/x
  3. Step 3: Cross multiply
    7,429.80x = 11,142.54 × 2,811.72
  4. Step 4: Simplify right side
    7,429.80x = 31,329,702.57
  5. Step 5: Solve for x
    x = 31,329,702.57/7,429.80
  6. Step 6: Final answer
    x = 4,216.76

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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.