Home / 21,137.03-31,709.20-7,098.42

Finding the Fourth Proportional to 21,137.03, 31,709.20 and 7,098.42

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Solution

The fourth proportional to 21,137.03, 31,709.20 and 7,098.42 is: 10,648.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.03 : 31,709.20 = 7,098.42 : x
  2. Step 2: Convert to fraction form
    21,137.03/31,709.20 = 7,098.42/x
  3. Step 3: Cross multiply
    21,137.03x = 31,709.20 × 7,098.42
  4. Step 4: Simplify right side
    21,137.03x = 225,085,060.92
  5. Step 5: Solve for x
    x = 225,085,060.92/21,137.03
  6. Step 6: Final answer
    x = 10,648.85

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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.