Home / 21,740.70-29,998.21-12,789.98

Finding the Fourth Proportional to 21,740.70, 29,998.21 and 12,789.98

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Solution

The fourth proportional to 21,740.70, 29,998.21 and 12,789.98 is: 17,647.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,740.70 : 29,998.21 = 12,789.98 : x
  2. Step 2: Convert to fraction form
    21,740.70/29,998.21 = 12,789.98/x
  3. Step 3: Cross multiply
    21,740.70x = 29,998.21 × 12,789.98
  4. Step 4: Simplify right side
    21,740.70x = 383,676,505.94
  5. Step 5: Solve for x
    x = 383,676,505.94/21,740.70
  6. Step 6: Final answer
    x = 17,647.85

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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.