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Finding the Fourth Proportional to 9,270.92, 13,890.18 and 7,720.90

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Solution

The fourth proportional to 9,270.92, 13,890.18 and 7,720.90 is: 11,567.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,270.92 : 13,890.18 = 7,720.90 : x
  2. Step 2: Convert to fraction form
    9,270.92/13,890.18 = 7,720.90/x
  3. Step 3: Cross multiply
    9,270.92x = 13,890.18 × 7,720.90
  4. Step 4: Simplify right side
    9,270.92x = 107,244,690.76
  5. Step 5: Solve for x
    x = 107,244,690.76/9,270.92
  6. Step 6: Final answer
    x = 11,567.86

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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.