Home / 21,723.06-29,970.85-12,161.54

Finding the Fourth Proportional to 21,723.06, 29,970.85 and 12,161.54

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Solution

The fourth proportional to 21,723.06, 29,970.85 and 12,161.54 is: 16,779.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723.06 : 29,970.85 = 12,161.54 : x
  2. Step 2: Convert to fraction form
    21,723.06/29,970.85 = 12,161.54/x
  3. Step 3: Cross multiply
    21,723.06x = 29,970.85 × 12,161.54
  4. Step 4: Simplify right side
    21,723.06x = 364,491,691.11
  5. Step 5: Solve for x
    x = 364,491,691.11/21,723.06
  6. Step 6: Final answer
    x = 16,779.02

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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.