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Finding the Fourth Proportional to 7,929.72, 11,881.82 and 5,163.17

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Solution

The fourth proportional to 7,929.72, 11,881.82 and 5,163.17 is: 7,736.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,929.72 : 11,881.82 = 5,163.17 : x
  2. Step 2: Convert to fraction form
    7,929.72/11,881.82 = 5,163.17/x
  3. Step 3: Cross multiply
    7,929.72x = 11,881.82 × 5,163.17
  4. Step 4: Simplify right side
    7,929.72x = 61,347,810.07
  5. Step 5: Solve for x
    x = 61,347,810.07/7,929.72
  6. Step 6: Final answer
    x = 7,736.44

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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.