Home / 5,380.78-7,425.47-2,990.68

Finding the Fourth Proportional to 5,380.78, 7,425.47 and 2,990.68

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Solution

The fourth proportional to 5,380.78, 7,425.47 and 2,990.68 is: 4,127.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,380.78 : 7,425.47 = 2,990.68 : x
  2. Step 2: Convert to fraction form
    5,380.78/7,425.47 = 2,990.68/x
  3. Step 3: Cross multiply
    5,380.78x = 7,425.47 × 2,990.68
  4. Step 4: Simplify right side
    5,380.78x = 22,207,245.74
  5. Step 5: Solve for x
    x = 22,207,245.74/5,380.78
  6. Step 6: Final answer
    x = 4,127.14

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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.