Home / 7,819.38-11,721.72-2,621.64

Finding the Fourth Proportional to 7,819.38, 11,721.72 and 2,621.64

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Solution

The fourth proportional to 7,819.38, 11,721.72 and 2,621.64 is: 3,930.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.38 : 11,721.72 = 2,621.64 : x
  2. Step 2: Convert to fraction form
    7,819.38/11,721.72 = 2,621.64/x
  3. Step 3: Cross multiply
    7,819.38x = 11,721.72 × 2,621.64
  4. Step 4: Simplify right side
    7,819.38x = 30,730,130.02
  5. Step 5: Solve for x
    x = 30,730,130.02/7,819.38
  6. Step 6: Final answer
    x = 3,930.00

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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.