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Finding the Fourth Proportional to 19,645.92, 27,111.93 and 11,147.82

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Solution

The fourth proportional to 19,645.92, 27,111.93 and 11,147.82 is: 15,384.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,645.92 : 27,111.93 = 11,147.82 : x
  2. Step 2: Convert to fraction form
    19,645.92/27,111.93 = 11,147.82/x
  3. Step 3: Cross multiply
    19,645.92x = 27,111.93 × 11,147.82
  4. Step 4: Simplify right side
    19,645.92x = 302,238,915.49
  5. Step 5: Solve for x
    x = 302,238,915.49/19,645.92
  6. Step 6: Final answer
    x = 15,384.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.