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Finding the Fourth Proportional to 14,418.72, 21,636.72 and 5,185.44

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Solution

The fourth proportional to 14,418.72, 21,636.72 and 5,185.44 is: 7,781.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,418.72 : 21,636.72 = 5,185.44 : x
  2. Step 2: Convert to fraction form
    14,418.72/21,636.72 = 5,185.44/x
  3. Step 3: Cross multiply
    14,418.72x = 21,636.72 × 5,185.44
  4. Step 4: Simplify right side
    14,418.72x = 112,195,913.36
  5. Step 5: Solve for x
    x = 112,195,913.36/14,418.72
  6. Step 6: Final answer
    x = 7,781.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.