Home / 21,723.59-29,977.10-12,161.86

Finding the Fourth Proportional to 21,723.59, 29,977.10 and 12,161.86

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Solution

The fourth proportional to 21,723.59, 29,977.10 and 12,161.86 is: 16,782.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723.59 : 29,977.10 = 12,161.86 : x
  2. Step 2: Convert to fraction form
    21,723.59/29,977.10 = 12,161.86/x
  3. Step 3: Cross multiply
    21,723.59x = 29,977.10 × 12,161.86
  4. Step 4: Simplify right side
    21,723.59x = 364,577,440.29
  5. Step 5: Solve for x
    x = 364,577,440.29/21,723.59
  6. Step 6: Final answer
    x = 16,782.56

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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.