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Finding the Fourth Proportional to 7,904.72, 11,857.04 and 2,061.20

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Solution

The fourth proportional to 7,904.72, 11,857.04 and 2,061.20 is: 3,091.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,904.72 : 11,857.04 = 2,061.20 : x
  2. Step 2: Convert to fraction form
    7,904.72/11,857.04 = 2,061.20/x
  3. Step 3: Cross multiply
    7,904.72x = 11,857.04 × 2,061.20
  4. Step 4: Simplify right side
    7,904.72x = 24,439,730.85
  5. Step 5: Solve for x
    x = 24,439,730.85/7,904.72
  6. Step 6: Final answer
    x = 3,091.79

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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.