Home / 3,121.08-4,307.24-1,723.92

Finding the Fourth Proportional to 3,121.08, 4,307.24 and 1,723.92

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Solution

The fourth proportional to 3,121.08, 4,307.24 and 1,723.92 is: 2,379.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.08 : 4,307.24 = 1,723.92 : x
  2. Step 2: Convert to fraction form
    3,121.08/4,307.24 = 1,723.92/x
  3. Step 3: Cross multiply
    3,121.08x = 4,307.24 × 1,723.92
  4. Step 4: Simplify right side
    3,121.08x = 7,425,337.18
  5. Step 5: Solve for x
    x = 7,425,337.18/3,121.08
  6. Step 6: Final answer
    x = 2,379.09

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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.