Home / 3,930.21-5,421.72-2,336.13

Finding the Fourth Proportional to 3,930.21, 5,421.72 and 2,336.13

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Solution

The fourth proportional to 3,930.21, 5,421.72 and 2,336.13 is: 3,222.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.21 : 5,421.72 = 2,336.13 : x
  2. Step 2: Convert to fraction form
    3,930.21/5,421.72 = 2,336.13/x
  3. Step 3: Cross multiply
    3,930.21x = 5,421.72 × 2,336.13
  4. Step 4: Simplify right side
    3,930.21x = 12,665,842.74
  5. Step 5: Solve for x
    x = 12,665,842.74/3,930.21
  6. Step 6: Final answer
    x = 3,222.69

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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.