Home / 5,380.39-7,424.28-2,990.35

Finding the Fourth Proportional to 5,380.39, 7,424.28 and 2,990.35

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Solution

The fourth proportional to 5,380.39, 7,424.28 and 2,990.35 is: 4,126.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,380.39 : 7,424.28 = 2,990.35 : x
  2. Step 2: Convert to fraction form
    5,380.39/7,424.28 = 2,990.35/x
  3. Step 3: Cross multiply
    5,380.39x = 7,424.28 × 2,990.35
  4. Step 4: Simplify right side
    5,380.39x = 22,201,158.58
  5. Step 5: Solve for x
    x = 22,201,158.58/5,380.39
  6. Step 6: Final answer
    x = 4,126.31

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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.