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Finding the Fourth Proportional to 21,374.43, 29,495.80 and 11,813.82

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Solution

The fourth proportional to 21,374.43, 29,495.80 and 11,813.82 is: 16,302.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,374.43 : 29,495.80 = 11,813.82 : x
  2. Step 2: Convert to fraction form
    21,374.43/29,495.80 = 11,813.82/x
  3. Step 3: Cross multiply
    21,374.43x = 29,495.80 × 11,813.82
  4. Step 4: Simplify right side
    21,374.43x = 348,458,130.88
  5. Step 5: Solve for x
    x = 348,458,130.88/21,374.43
  6. Step 6: Final answer
    x = 16,302.57

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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.