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Finding the Fourth Proportional to 21,370.50, 29,491.29 and 11,941.29

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Solution

The fourth proportional to 21,370.50, 29,491.29 and 11,941.29 is: 16,478.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.50 : 29,491.29 = 11,941.29 : x
  2. Step 2: Convert to fraction form
    21,370.50/29,491.29 = 11,941.29/x
  3. Step 3: Cross multiply
    21,370.50x = 29,491.29 × 11,941.29
  4. Step 4: Simplify right side
    21,370.50x = 352,164,046.36
  5. Step 5: Solve for x
    x = 352,164,046.36/21,370.50
  6. Step 6: Final answer
    x = 16,478.98

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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.