Home / 21,732.90-29,998.53-12,779.97

Finding the Fourth Proportional to 21,732.90, 29,998.53 and 12,779.97

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Solution

The fourth proportional to 21,732.90, 29,998.53 and 12,779.97 is: 17,640.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,732.90 : 29,998.53 = 12,779.97 : x
  2. Step 2: Convert to fraction form
    21,732.90/29,998.53 = 12,779.97/x
  3. Step 3: Cross multiply
    21,732.90x = 29,998.53 × 12,779.97
  4. Step 4: Simplify right side
    21,732.90x = 383,380,313.44
  5. Step 5: Solve for x
    x = 383,380,313.44/21,732.90
  6. Step 6: Final answer
    x = 17,640.55

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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.