Home / 8,112.15-12,170.66-3,429.74

Finding the Fourth Proportional to 8,112.15, 12,170.66 and 3,429.74

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Solution

The fourth proportional to 8,112.15, 12,170.66 and 3,429.74 is: 5,145.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.15 : 12,170.66 = 3,429.74 : x
  2. Step 2: Convert to fraction form
    8,112.15/12,170.66 = 3,429.74/x
  3. Step 3: Cross multiply
    8,112.15x = 12,170.66 × 3,429.74
  4. Step 4: Simplify right side
    8,112.15x = 41,742,212.71
  5. Step 5: Solve for x
    x = 41,742,212.71/8,112.15
  6. Step 6: Final answer
    x = 5,145.64

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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.