Home / 8,081.22-12,128.31-4,186.74

Finding the Fourth Proportional to 8,081.22, 12,128.31 and 4,186.74

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Solution

The fourth proportional to 8,081.22, 12,128.31 and 4,186.74 is: 6,283.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.22 : 12,128.31 = 4,186.74 : x
  2. Step 2: Convert to fraction form
    8,081.22/12,128.31 = 4,186.74/x
  3. Step 3: Cross multiply
    8,081.22x = 12,128.31 × 4,186.74
  4. Step 4: Simplify right side
    8,081.22x = 50,778,080.61
  5. Step 5: Solve for x
    x = 50,778,080.61/8,081.22
  6. Step 6: Final answer
    x = 6,283.47

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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.