Home / 7,420.80-11,138.40-3,727.20

Finding the Fourth Proportional to 7,420.80, 11,138.40 and 3,727.20

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Solution

The fourth proportional to 7,420.80, 11,138.40 and 3,727.20 is: 5,594.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.80 : 11,138.40 = 3,727.20 : x
  2. Step 2: Convert to fraction form
    7,420.80/11,138.40 = 3,727.20/x
  3. Step 3: Cross multiply
    7,420.80x = 11,138.40 × 3,727.20
  4. Step 4: Simplify right side
    7,420.80x = 41,515,044.48
  5. Step 5: Solve for x
    x = 41,515,044.48/7,420.80
  6. Step 6: Final answer
    x = 5,594.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.