Home / 21,723.18-29,971.02-12,161.66

Finding the Fourth Proportional to 21,723.18, 29,971.02 and 12,161.66

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Solution

The fourth proportional to 21,723.18, 29,971.02 and 12,161.66 is: 16,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723.18 : 29,971.02 = 12,161.66 : x
  2. Step 2: Convert to fraction form
    21,723.18/29,971.02 = 12,161.66/x
  3. Step 3: Cross multiply
    21,723.18x = 29,971.02 × 12,161.66
  4. Step 4: Simplify right side
    21,723.18x = 364,497,249.63
  5. Step 5: Solve for x
    x = 364,497,249.63/21,723.18
  6. Step 6: Final answer
    x = 16,779.19

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1.5x scale

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.