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Finding the Fourth Proportional to 19,599.72, 29,400.54 and 7,911.48

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Solution

The fourth proportional to 19,599.72, 29,400.54 and 7,911.48 is: 11,867.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,599.72 : 29,400.54 = 7,911.48 : x
  2. Step 2: Convert to fraction form
    19,599.72/29,400.54 = 7,911.48/x
  3. Step 3: Cross multiply
    19,599.72x = 29,400.54 × 7,911.48
  4. Step 4: Simplify right side
    19,599.72x = 232,601,784.20
  5. Step 5: Solve for x
    x = 232,601,784.20/19,599.72
  6. Step 6: Final answer
    x = 11,867.61

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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.