Home / 20,872.67-31,312.64-9,185.58

Finding the Fourth Proportional to 20,872.67, 31,312.64 and 9,185.58

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Solution

The fourth proportional to 20,872.67, 31,312.64 and 9,185.58 is: 13,779.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.67 : 31,312.64 = 9,185.58 : x
  2. Step 2: Convert to fraction form
    20,872.67/31,312.64 = 9,185.58/x
  3. Step 3: Cross multiply
    20,872.67x = 31,312.64 × 9,185.58
  4. Step 4: Simplify right side
    20,872.67x = 287,624,759.73
  5. Step 5: Solve for x
    x = 287,624,759.73/20,872.67
  6. Step 6: Final answer
    x = 13,779.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.