Home / 20,992.76-31,479.56-9,146.04

Finding the Fourth Proportional to 20,992.76, 31,479.56 and 9,146.04

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Solution

The fourth proportional to 20,992.76, 31,479.56 and 9,146.04 is: 13,714.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.76 : 31,479.56 = 9,146.04 : x
  2. Step 2: Convert to fraction form
    20,992.76/31,479.56 = 9,146.04/x
  3. Step 3: Cross multiply
    20,992.76x = 31,479.56 × 9,146.04
  4. Step 4: Simplify right side
    20,992.76x = 287,913,269.21
  5. Step 5: Solve for x
    x = 287,913,269.21/20,992.76
  6. Step 6: Final answer
    x = 13,714.89

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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.