Home / 5,129.72-7,695.78-2,206.40

Finding the Fourth Proportional to 5,129.72, 7,695.78 and 2,206.40

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Solution

The fourth proportional to 5,129.72, 7,695.78 and 2,206.40 is: 3,310.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.72 : 7,695.78 = 2,206.40 : x
  2. Step 2: Convert to fraction form
    5,129.72/7,695.78 = 2,206.40/x
  3. Step 3: Cross multiply
    5,129.72x = 7,695.78 × 2,206.40
  4. Step 4: Simplify right side
    5,129.72x = 16,979,968.99
  5. Step 5: Solve for x
    x = 16,979,968.99/5,129.72
  6. Step 6: Final answer
    x = 3,310.12

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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.