Home / 8,109.12-12,165.60-4,212.64

Finding the Fourth Proportional to 8,109.12, 12,165.60 and 4,212.64

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Solution

The fourth proportional to 8,109.12, 12,165.60 and 4,212.64 is: 6,319.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,109.12 : 12,165.60 = 4,212.64 : x
  2. Step 2: Convert to fraction form
    8,109.12/12,165.60 = 4,212.64/x
  3. Step 3: Cross multiply
    8,109.12x = 12,165.60 × 4,212.64
  4. Step 4: Simplify right side
    8,109.12x = 51,249,293.18
  5. Step 5: Solve for x
    x = 51,249,293.18/8,109.12
  6. Step 6: Final answer
    x = 6,319.96

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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.