Home / 21,237.66-31,829.25-8,766.43

Finding the Fourth Proportional to 21,237.66, 31,829.25 and 8,766.43

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Solution

The fourth proportional to 21,237.66, 31,829.25 and 8,766.43 is: 13,138.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,237.66 : 31,829.25 = 8,766.43 : x
  2. Step 2: Convert to fraction form
    21,237.66/31,829.25 = 8,766.43/x
  3. Step 3: Cross multiply
    21,237.66x = 31,829.25 × 8,766.43
  4. Step 4: Simplify right side
    21,237.66x = 279,028,845.38
  5. Step 5: Solve for x
    x = 279,028,845.38/21,237.66
  6. Step 6: Final answer
    x = 13,138.40

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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.