Home / 21,283.38-31,929.66-6,491.90

Finding the Fourth Proportional to 21,283.38, 31,929.66 and 6,491.90

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Solution

The fourth proportional to 21,283.38, 31,929.66 and 6,491.90 is: 9,739.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,283.38 : 31,929.66 = 6,491.90 : x
  2. Step 2: Convert to fraction form
    21,283.38/31,929.66 = 6,491.90/x
  3. Step 3: Cross multiply
    21,283.38x = 31,929.66 × 6,491.90
  4. Step 4: Simplify right side
    21,283.38x = 207,284,239.58
  5. Step 5: Solve for x
    x = 207,284,239.58/21,283.38
  6. Step 6: Final answer
    x = 9,739.25

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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.