Home / 5,380.31-7,424.63-2,990.43

Finding the Fourth Proportional to 5,380.31, 7,424.63 and 2,990.43

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Solution

The fourth proportional to 5,380.31, 7,424.63 and 2,990.43 is: 4,126.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,380.31 : 7,424.63 = 2,990.43 : x
  2. Step 2: Convert to fraction form
    5,380.31/7,424.63 = 2,990.43/x
  3. Step 3: Cross multiply
    5,380.31x = 7,424.63 × 2,990.43
  4. Step 4: Simplify right side
    5,380.31x = 22,202,832.55
  5. Step 5: Solve for x
    x = 22,202,832.55/5,380.31
  6. Step 6: Final answer
    x = 4,126.68

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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.