Home / 3,930.06-5,421.23-2,455.50

Finding the Fourth Proportional to 3,930.06, 5,421.23 and 2,455.50

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Solution

The fourth proportional to 3,930.06, 5,421.23 and 2,455.50 is: 3,387.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.06 : 5,421.23 = 2,455.50 : x
  2. Step 2: Convert to fraction form
    3,930.06/5,421.23 = 2,455.50/x
  3. Step 3: Cross multiply
    3,930.06x = 5,421.23 × 2,455.50
  4. Step 4: Simplify right side
    3,930.06x = 13,311,830.27
  5. Step 5: Solve for x
    x = 13,311,830.27/3,930.06
  6. Step 6: Final answer
    x = 3,387.18

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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.