Home / 3,618.57-4,990.55-2,781.30

Finding the Fourth Proportional to 3,618.57, 4,990.55 and 2,781.30

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Solution

The fourth proportional to 3,618.57, 4,990.55 and 2,781.30 is: 3,835.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.57 : 4,990.55 = 2,781.30 : x
  2. Step 2: Convert to fraction form
    3,618.57/4,990.55 = 2,781.30/x
  3. Step 3: Cross multiply
    3,618.57x = 4,990.55 × 2,781.30
  4. Step 4: Simplify right side
    3,618.57x = 13,880,202.81
  5. Step 5: Solve for x
    x = 13,880,202.81/3,618.57
  6. Step 6: Final answer
    x = 3,835.83

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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.