Home / 21,612.83-29,821.77-12,660.50

Finding the Fourth Proportional to 21,612.83, 29,821.77 and 12,660.50

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Solution

The fourth proportional to 21,612.83, 29,821.77 and 12,660.50 is: 17,469.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,612.83 : 29,821.77 = 12,660.50 : x
  2. Step 2: Convert to fraction form
    21,612.83/29,821.77 = 12,660.50/x
  3. Step 3: Cross multiply
    21,612.83x = 29,821.77 × 12,660.50
  4. Step 4: Simplify right side
    21,612.83x = 377,558,593.64
  5. Step 5: Solve for x
    x = 377,558,593.64/21,612.83
  6. Step 6: Final answer
    x = 17,469.19

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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.