Home / 8,720.72-13,089.30-3,179.42

Finding the Fourth Proportional to 8,720.72, 13,089.30 and 3,179.42

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Solution

The fourth proportional to 8,720.72, 13,089.30 and 3,179.42 is: 4,772.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.72 : 13,089.30 = 3,179.42 : x
  2. Step 2: Convert to fraction form
    8,720.72/13,089.30 = 3,179.42/x
  3. Step 3: Cross multiply
    8,720.72x = 13,089.30 × 3,179.42
  4. Step 4: Simplify right side
    8,720.72x = 41,616,382.21
  5. Step 5: Solve for x
    x = 41,616,382.21/8,720.72
  6. Step 6: Final answer
    x = 4,772.13

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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.