Home / 7,280.50-10,921.30-2,086.78

Finding the Fourth Proportional to 7,280.50, 10,921.30 and 2,086.78

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Solution

The fourth proportional to 7,280.50, 10,921.30 and 2,086.78 is: 3,130.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.50 : 10,921.30 = 2,086.78 : x
  2. Step 2: Convert to fraction form
    7,280.50/10,921.30 = 2,086.78/x
  3. Step 3: Cross multiply
    7,280.50x = 10,921.30 × 2,086.78
  4. Step 4: Simplify right side
    7,280.50x = 22,790,350.41
  5. Step 5: Solve for x
    x = 22,790,350.41/7,280.50
  6. Step 6: Final answer
    x = 3,130.33

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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.