Home / 5,219.91-7,815.78-3,130.11

Finding the Fourth Proportional to 5,219.91, 7,815.78 and 3,130.11

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Solution

The fourth proportional to 5,219.91, 7,815.78 and 3,130.11 is: 4,686.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,219.91 : 7,815.78 = 3,130.11 : x
  2. Step 2: Convert to fraction form
    5,219.91/7,815.78 = 3,130.11/x
  3. Step 3: Cross multiply
    5,219.91x = 7,815.78 × 3,130.11
  4. Step 4: Simplify right side
    5,219.91x = 24,464,251.14
  5. Step 5: Solve for x
    x = 24,464,251.14/5,219.91
  6. Step 6: Final answer
    x = 4,686.72

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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.