Home / 21,647.86-29,872.87-12,215.81

Finding the Fourth Proportional to 21,647.86, 29,872.87 and 12,215.81

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Solution

The fourth proportional to 21,647.86, 29,872.87 and 12,215.81 is: 16,857.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,647.86 : 29,872.87 = 12,215.81 : x
  2. Step 2: Convert to fraction form
    21,647.86/29,872.87 = 12,215.81/x
  3. Step 3: Cross multiply
    21,647.86x = 29,872.87 × 12,215.81
  4. Step 4: Simplify right side
    21,647.86x = 364,921,348.22
  5. Step 5: Solve for x
    x = 364,921,348.22/21,647.86
  6. Step 6: Final answer
    x = 16,857.16

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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.