Home / 21,167.40-31,743.80-8,683.90

Finding the Fourth Proportional to 21,167.40, 31,743.80 and 8,683.90

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Solution

The fourth proportional to 21,167.40, 31,743.80 and 8,683.90 is: 13,022.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.40 : 31,743.80 = 8,683.90 : x
  2. Step 2: Convert to fraction form
    21,167.40/31,743.80 = 8,683.90/x
  3. Step 3: Cross multiply
    21,167.40x = 31,743.80 × 8,683.90
  4. Step 4: Simplify right side
    21,167.40x = 275,659,984.82
  5. Step 5: Solve for x
    x = 275,659,984.82/21,167.40
  6. Step 6: Final answer
    x = 13,022.86

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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.