Home / 12,115.92-18,168.72-4,618.20

Finding the Fourth Proportional to 12,115.92, 18,168.72 and 4,618.20

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Solution

The fourth proportional to 12,115.92, 18,168.72 and 4,618.20 is: 6,925.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.92 : 18,168.72 = 4,618.20 : x
  2. Step 2: Convert to fraction form
    12,115.92/18,168.72 = 4,618.20/x
  3. Step 3: Cross multiply
    12,115.92x = 18,168.72 × 4,618.20
  4. Step 4: Simplify right side
    12,115.92x = 83,906,782.70
  5. Step 5: Solve for x
    x = 83,906,782.70/12,115.92
  6. Step 6: Final answer
    x = 6,925.33

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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.