Home / 3,930.53-5,421.33-3,256.20

Finding the Fourth Proportional to 3,930.53, 5,421.33 and 3,256.20

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Solution

The fourth proportional to 3,930.53, 5,421.33 and 3,256.20 is: 4,491.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.53 : 5,421.33 = 3,256.20 : x
  2. Step 2: Convert to fraction form
    3,930.53/5,421.33 = 3,256.20/x
  3. Step 3: Cross multiply
    3,930.53x = 5,421.33 × 3,256.20
  4. Step 4: Simplify right side
    3,930.53x = 17,652,934.75
  5. Step 5: Solve for x
    x = 17,652,934.75/3,930.53
  6. Step 6: Final answer
    x = 4,491.24

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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.