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Finding the Fourth Proportional to 21,703.91, 29,950.16 and 12,141.95

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Solution

The fourth proportional to 21,703.91, 29,950.16 and 12,141.95 is: 16,755.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,703.91 : 29,950.16 = 12,141.95 : x
  2. Step 2: Convert to fraction form
    21,703.91/29,950.16 = 12,141.95/x
  3. Step 3: Cross multiply
    21,703.91x = 29,950.16 × 12,141.95
  4. Step 4: Simplify right side
    21,703.91x = 363,653,134.75
  5. Step 5: Solve for x
    x = 363,653,134.75/21,703.91
  6. Step 6: Final answer
    x = 16,755.19

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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.