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Finding the Fourth Proportional to 18,491.65, 27,735.90 and 7,961.25

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Solution

The fourth proportional to 18,491.65, 27,735.90 and 7,961.25 is: 11,941.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.65 : 27,735.90 = 7,961.25 : x
  2. Step 2: Convert to fraction form
    18,491.65/27,735.90 = 7,961.25/x
  3. Step 3: Cross multiply
    18,491.65x = 27,735.90 × 7,961.25
  4. Step 4: Simplify right side
    18,491.65x = 220,812,433.88
  5. Step 5: Solve for x
    x = 220,812,433.88/18,491.65
  6. Step 6: Final answer
    x = 11,941.20

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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.