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Finding the Fourth Proportional to 8,998, 12,418.92 and 5,272

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Solution

The fourth proportional to 8,998, 12,418.92 and 5,272 is: 7,276.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,998 : 12,418.92 = 5,272 : x
  2. Step 2: Convert to fraction form
    8,998/12,418.92 = 5,272/x
  3. Step 3: Cross multiply
    8,998x = 12,418.92 × 5,272
  4. Step 4: Simplify right side
    8,998x = 65,472,546.24
  5. Step 5: Solve for x
    x = 65,472,546.24/8,998
  6. Step 6: Final answer
    x = 7,276.34

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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.