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Finding the Fourth Proportional to 21,668.80, 29,916.84 and 17,699.44

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Solution

The fourth proportional to 21,668.80, 29,916.84 and 17,699.44 is: 24,436.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,668.80 : 29,916.84 = 17,699.44 : x
  2. Step 2: Convert to fraction form
    21,668.80/29,916.84 = 17,699.44/x
  3. Step 3: Cross multiply
    21,668.80x = 29,916.84 × 17,699.44
  4. Step 4: Simplify right side
    21,668.80x = 529,511,314.57
  5. Step 5: Solve for x
    x = 529,511,314.57/21,668.80
  6. Step 6: Final answer
    x = 24,436.58

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1.5x scale

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.