Home / 13,620.12-20,433.48-5,718.30

Finding the Fourth Proportional to 13,620.12, 20,433.48 and 5,718.30

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Solution

The fourth proportional to 13,620.12, 20,433.48 and 5,718.30 is: 8,578.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.12 : 20,433.48 = 5,718.30 : x
  2. Step 2: Convert to fraction form
    13,620.12/20,433.48 = 5,718.30/x
  3. Step 3: Cross multiply
    13,620.12x = 20,433.48 × 5,718.30
  4. Step 4: Simplify right side
    13,620.12x = 116,844,768.68
  5. Step 5: Solve for x
    x = 116,844,768.68/13,620.12
  6. Step 6: Final answer
    x = 8,578.84

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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.