Home / 7,278.20-10,920.90-4,160.60

Finding the Fourth Proportional to 7,278.20, 10,920.90 and 4,160.60

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Solution

The fourth proportional to 7,278.20, 10,920.90 and 4,160.60 is: 6,242.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.20 : 10,920.90 = 4,160.60 : x
  2. Step 2: Convert to fraction form
    7,278.20/10,920.90 = 4,160.60/x
  3. Step 3: Cross multiply
    7,278.20x = 10,920.90 × 4,160.60
  4. Step 4: Simplify right side
    7,278.20x = 45,437,496.54
  5. Step 5: Solve for x
    x = 45,437,496.54/7,278.20
  6. Step 6: Final answer
    x = 6,242.96

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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.