Home / 3,115.14-4,299.78-2,122.08

Finding the Fourth Proportional to 3,115.14, 4,299.78 and 2,122.08

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Solution

The fourth proportional to 3,115.14, 4,299.78 and 2,122.08 is: 2,929.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.14 : 4,299.78 = 2,122.08 : x
  2. Step 2: Convert to fraction form
    3,115.14/4,299.78 = 2,122.08/x
  3. Step 3: Cross multiply
    3,115.14x = 4,299.78 × 2,122.08
  4. Step 4: Simplify right side
    3,115.14x = 9,124,477.14
  5. Step 5: Solve for x
    x = 9,124,477.14/3,115.14
  6. Step 6: Final answer
    x = 2,929.07

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1.5x scale

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.