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Finding the Fourth Proportional to 21,603, 29,800.05 and 12,648.78

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Solution

The fourth proportional to 21,603, 29,800.05 and 12,648.78 is: 17,448.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603 : 29,800.05 = 12,648.78 : x
  2. Step 2: Convert to fraction form
    21,603/29,800.05 = 12,648.78/x
  3. Step 3: Cross multiply
    21,603x = 29,800.05 × 12,648.78
  4. Step 4: Simplify right side
    21,603x = 376,934,276.44
  5. Step 5: Solve for x
    x = 376,934,276.44/21,603
  6. Step 6: Final answer
    x = 17,448.24

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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.