Home / 5,378.34-7,420.81-3,138.94

Finding the Fourth Proportional to 5,378.34, 7,420.81 and 3,138.94

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Solution

The fourth proportional to 5,378.34, 7,420.81 and 3,138.94 is: 4,330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.34 : 7,420.81 = 3,138.94 : x
  2. Step 2: Convert to fraction form
    5,378.34/7,420.81 = 3,138.94/x
  3. Step 3: Cross multiply
    5,378.34x = 7,420.81 × 3,138.94
  4. Step 4: Simplify right side
    5,378.34x = 23,293,424.54
  5. Step 5: Solve for x
    x = 23,293,424.54/5,378.34
  6. Step 6: Final answer
    x = 4,330.97

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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.