Home / 8,825.61-13,234.21-5,128.90

Finding the Fourth Proportional to 8,825.61, 13,234.21 and 5,128.90

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Solution

The fourth proportional to 8,825.61, 13,234.21 and 5,128.90 is: 7,690.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,825.61 : 13,234.21 = 5,128.90 : x
  2. Step 2: Convert to fraction form
    8,825.61/13,234.21 = 5,128.90/x
  3. Step 3: Cross multiply
    8,825.61x = 13,234.21 × 5,128.90
  4. Step 4: Simplify right side
    8,825.61x = 67,876,939.67
  5. Step 5: Solve for x
    x = 67,876,939.67/8,825.61
  6. Step 6: Final answer
    x = 7,690.91

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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.