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Finding the Fourth Proportional to 21,370.88, 29,493.12 and 11,940

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Solution

The fourth proportional to 21,370.88, 29,493.12 and 11,940 is: 16,477.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.88 : 29,493.12 = 11,940 : x
  2. Step 2: Convert to fraction form
    21,370.88/29,493.12 = 11,940/x
  3. Step 3: Cross multiply
    21,370.88x = 29,493.12 × 11,940
  4. Step 4: Simplify right side
    21,370.88x = 352,147,852.80
  5. Step 5: Solve for x
    x = 352,147,852.80/21,370.88
  6. Step 6: Final answer
    x = 16,477.93

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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.