Home / 3,992.40-5,509.08-2,478.96

Finding the Fourth Proportional to 3,992.40, 5,509.08 and 2,478.96

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Solution

The fourth proportional to 3,992.40, 5,509.08 and 2,478.96 is: 3,420.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.40 : 5,509.08 = 2,478.96 : x
  2. Step 2: Convert to fraction form
    3,992.40/5,509.08 = 2,478.96/x
  3. Step 3: Cross multiply
    3,992.40x = 5,509.08 × 2,478.96
  4. Step 4: Simplify right side
    3,992.40x = 13,656,788.96
  5. Step 5: Solve for x
    x = 13,656,788.96/3,992.40
  6. Step 6: Final answer
    x = 3,420.70

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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.