Home / 21,198.78-29,254.42-13,245.61

Finding the Fourth Proportional to 21,198.78, 29,254.42 and 13,245.61

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Solution

The fourth proportional to 21,198.78, 29,254.42 and 13,245.61 is: 18,279.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.78 : 29,254.42 = 13,245.61 : x
  2. Step 2: Convert to fraction form
    21,198.78/29,254.42 = 13,245.61/x
  3. Step 3: Cross multiply
    21,198.78x = 29,254.42 × 13,245.61
  4. Step 4: Simplify right side
    21,198.78x = 387,492,638.10
  5. Step 5: Solve for x
    x = 387,492,638.10/21,198.78
  6. Step 6: Final answer
    x = 18,279.01

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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.