Home / 21,330.90-31,992.30-6,540.30

Finding the Fourth Proportional to 21,330.90, 31,992.30 and 6,540.30

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Solution

The fourth proportional to 21,330.90, 31,992.30 and 6,540.30 is: 9,809.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.90 : 31,992.30 = 6,540.30 : x
  2. Step 2: Convert to fraction form
    21,330.90/31,992.30 = 6,540.30/x
  3. Step 3: Cross multiply
    21,330.90x = 31,992.30 × 6,540.30
  4. Step 4: Simplify right side
    21,330.90x = 209,239,239.69
  5. Step 5: Solve for x
    x = 209,239,239.69/21,330.90
  6. Step 6: Final answer
    x = 9,809.21

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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.