Home / 21,193.04-31,789.55-8,719.85

Finding the Fourth Proportional to 21,193.04, 31,789.55 and 8,719.85

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Solution

The fourth proportional to 21,193.04, 31,789.55 and 8,719.85 is: 13,079.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,193.04 : 31,789.55 = 8,719.85 : x
  2. Step 2: Convert to fraction form
    21,193.04/31,789.55 = 8,719.85/x
  3. Step 3: Cross multiply
    21,193.04x = 31,789.55 × 8,719.85
  4. Step 4: Simplify right side
    21,193.04x = 277,200,208.84
  5. Step 5: Solve for x
    x = 277,200,208.84/21,193.04
  6. Step 6: Final answer
    x = 13,079.77

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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.