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Finding the Fourth Proportional to 7,931.80, 11,901.80 and 3,492.60

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Solution

The fourth proportional to 7,931.80, 11,901.80 and 3,492.60 is: 5,240.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,931.80 : 11,901.80 = 3,492.60 : x
  2. Step 2: Convert to fraction form
    7,931.80/11,901.80 = 3,492.60/x
  3. Step 3: Cross multiply
    7,931.80x = 11,901.80 × 3,492.60
  4. Step 4: Simplify right side
    7,931.80x = 41,568,226.68
  5. Step 5: Solve for x
    x = 41,568,226.68/7,931.80
  6. Step 6: Final answer
    x = 5,240.71

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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.