Home / 3,115.24-4,299.72-2,122.90

Finding the Fourth Proportional to 3,115.24, 4,299.72 and 2,122.90

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Solution

The fourth proportional to 3,115.24, 4,299.72 and 2,122.90 is: 2,930.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.24 : 4,299.72 = 2,122.90 : x
  2. Step 2: Convert to fraction form
    3,115.24/4,299.72 = 2,122.90/x
  3. Step 3: Cross multiply
    3,115.24x = 4,299.72 × 2,122.90
  4. Step 4: Simplify right side
    3,115.24x = 9,127,875.59
  5. Step 5: Solve for x
    x = 9,127,875.59/3,115.24
  6. Step 6: Final answer
    x = 2,930.07

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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.