Home / 3,688.20-5,089.14-2,115.99

Finding the Fourth Proportional to 3,688.20, 5,089.14 and 2,115.99

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Solution

The fourth proportional to 3,688.20, 5,089.14 and 2,115.99 is: 2,919.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.20 : 5,089.14 = 2,115.99 : x
  2. Step 2: Convert to fraction form
    3,688.20/5,089.14 = 2,115.99/x
  3. Step 3: Cross multiply
    3,688.20x = 5,089.14 × 2,115.99
  4. Step 4: Simplify right side
    3,688.20x = 10,768,569.35
  5. Step 5: Solve for x
    x = 10,768,569.35/3,688.20
  6. Step 6: Final answer
    x = 2,919.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.