Home / 21,550.84-29,739.90-12,121

Finding the Fourth Proportional to 21,550.84, 29,739.90 and 12,121

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Solution

The fourth proportional to 21,550.84, 29,739.90 and 12,121 is: 16,726.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,550.84 : 29,739.90 = 12,121 : x
  2. Step 2: Convert to fraction form
    21,550.84/29,739.90 = 12,121/x
  3. Step 3: Cross multiply
    21,550.84x = 29,739.90 × 12,121
  4. Step 4: Simplify right side
    21,550.84x = 360,477,327.90
  5. Step 5: Solve for x
    x = 360,477,327.90/21,550.84
  6. Step 6: Final answer
    x = 16,726.83

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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.