Home / 8,515.29-12,755.52-4,129.14

Finding the Fourth Proportional to 8,515.29, 12,755.52 and 4,129.14

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Solution

The fourth proportional to 8,515.29, 12,755.52 and 4,129.14 is: 6,185.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.29 : 12,755.52 = 4,129.14 : x
  2. Step 2: Convert to fraction form
    8,515.29/12,755.52 = 4,129.14/x
  3. Step 3: Cross multiply
    8,515.29x = 12,755.52 × 4,129.14
  4. Step 4: Simplify right side
    8,515.29x = 52,669,327.85
  5. Step 5: Solve for x
    x = 52,669,327.85/8,515.29
  6. Step 6: Final answer
    x = 6,185.27

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1.5x scale

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.