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Finding the Fourth Proportional to 8,172.70, 11,278.54 and 4,636.44

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Solution

The fourth proportional to 8,172.70, 11,278.54 and 4,636.44 is: 6,398.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,172.70 : 11,278.54 = 4,636.44 : x
  2. Step 2: Convert to fraction form
    8,172.70/11,278.54 = 4,636.44/x
  3. Step 3: Cross multiply
    8,172.70x = 11,278.54 × 4,636.44
  4. Step 4: Simplify right side
    8,172.70x = 52,292,279.79
  5. Step 5: Solve for x
    x = 52,292,279.79/8,172.70
  6. Step 6: Final answer
    x = 6,398.41

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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.