Home / 8,115.72-12,172.68-3,730.32

Finding the Fourth Proportional to 8,115.72, 12,172.68 and 3,730.32

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Solution

The fourth proportional to 8,115.72, 12,172.68 and 3,730.32 is: 5,595.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.72 : 12,172.68 = 3,730.32 : x
  2. Step 2: Convert to fraction form
    8,115.72/12,172.68 = 3,730.32/x
  3. Step 3: Cross multiply
    8,115.72x = 12,172.68 × 3,730.32
  4. Step 4: Simplify right side
    8,115.72x = 45,407,991.66
  5. Step 5: Solve for x
    x = 45,407,991.66/8,115.72
  6. Step 6: Final answer
    x = 5,595.07

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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.