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Finding the Fourth Proportional to 20,626.56, 30,941.91 and 7,475.94

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Solution

The fourth proportional to 20,626.56, 30,941.91 and 7,475.94 is: 11,214.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,626.56 : 30,941.91 = 7,475.94 : x
  2. Step 2: Convert to fraction form
    20,626.56/30,941.91 = 7,475.94/x
  3. Step 3: Cross multiply
    20,626.56x = 30,941.91 × 7,475.94
  4. Step 4: Simplify right side
    20,626.56x = 231,319,862.65
  5. Step 5: Solve for x
    x = 231,319,862.65/20,626.56
  6. Step 6: Final answer
    x = 11,214.66

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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.