Home / 21,271.30-31,911.56-6,479.83

Finding the Fourth Proportional to 21,271.30, 31,911.56 and 6,479.83

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Solution

The fourth proportional to 21,271.30, 31,911.56 and 6,479.83 is: 9,721.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.30 : 31,911.56 = 6,479.83 : x
  2. Step 2: Convert to fraction form
    21,271.30/31,911.56 = 6,479.83/x
  3. Step 3: Cross multiply
    21,271.30x = 31,911.56 × 6,479.83
  4. Step 4: Simplify right side
    21,271.30x = 206,781,291.88
  5. Step 5: Solve for x
    x = 206,781,291.88/21,271.30
  6. Step 6: Final answer
    x = 9,721.14

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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.