Home / 21,106.78-31,664.25-6,314.42

Finding the Fourth Proportional to 21,106.78, 31,664.25 and 6,314.42

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Solution

The fourth proportional to 21,106.78, 31,664.25 and 6,314.42 is: 9,472.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.78 : 31,664.25 = 6,314.42 : x
  2. Step 2: Convert to fraction form
    21,106.78/31,664.25 = 6,314.42/x
  3. Step 3: Cross multiply
    21,106.78x = 31,664.25 × 6,314.42
  4. Step 4: Simplify right side
    21,106.78x = 199,941,452.65
  5. Step 5: Solve for x
    x = 199,941,452.65/21,106.78
  6. Step 6: Final answer
    x = 9,472.86

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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.