Home / 11,720.20-17,583.12-3,928.78

Finding the Fourth Proportional to 11,720.20, 17,583.12 and 3,928.78

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Solution

The fourth proportional to 11,720.20, 17,583.12 and 3,928.78 is: 5,894.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.20 : 17,583.12 = 3,928.78 : x
  2. Step 2: Convert to fraction form
    11,720.20/17,583.12 = 3,928.78/x
  3. Step 3: Cross multiply
    11,720.20x = 17,583.12 × 3,928.78
  4. Step 4: Simplify right side
    11,720.20x = 69,080,210.19
  5. Step 5: Solve for x
    x = 69,080,210.19/11,720.20
  6. Step 6: Final answer
    x = 5,894.12

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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.