Home / 21,269.66-31,906.74-8,790.62

Finding the Fourth Proportional to 21,269.66, 31,906.74 and 8,790.62

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Solution

The fourth proportional to 21,269.66, 31,906.74 and 8,790.62 is: 13,186.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.66 : 31,906.74 = 8,790.62 : x
  2. Step 2: Convert to fraction form
    21,269.66/31,906.74 = 8,790.62/x
  3. Step 3: Cross multiply
    21,269.66x = 31,906.74 × 8,790.62
  4. Step 4: Simplify right side
    21,269.66x = 280,480,026.78
  5. Step 5: Solve for x
    x = 280,480,026.78/21,269.66
  6. Step 6: Final answer
    x = 13,186.86

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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.