Home / 13,512.32-20,268.36-5,720

Finding the Fourth Proportional to 13,512.32, 20,268.36 and 5,720

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Solution

The fourth proportional to 13,512.32, 20,268.36 and 5,720 is: 8,579.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,512.32 : 20,268.36 = 5,720 : x
  2. Step 2: Convert to fraction form
    13,512.32/20,268.36 = 5,720/x
  3. Step 3: Cross multiply
    13,512.32x = 20,268.36 × 5,720
  4. Step 4: Simplify right side
    13,512.32x = 115,935,019.20
  5. Step 5: Solve for x
    x = 115,935,019.20/13,512.32
  6. Step 6: Final answer
    x = 8,579.95

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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.