Home / 12,120.24-18,180.72-4,724.40

Finding the Fourth Proportional to 12,120.24, 18,180.72 and 4,724.40

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Solution

The fourth proportional to 12,120.24, 18,180.72 and 4,724.40 is: 7,086.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.24 : 18,180.72 = 4,724.40 : x
  2. Step 2: Convert to fraction form
    12,120.24/18,180.72 = 4,724.40/x
  3. Step 3: Cross multiply
    12,120.24x = 18,180.72 × 4,724.40
  4. Step 4: Simplify right side
    12,120.24x = 85,892,993.57
  5. Step 5: Solve for x
    x = 85,892,993.57/12,120.24
  6. Step 6: Final answer
    x = 7,086.74

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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.