Home / 3,685.92-5,086.65-2,890.20

Finding the Fourth Proportional to 3,685.92, 5,086.65 and 2,890.20

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Solution

The fourth proportional to 3,685.92, 5,086.65 and 2,890.20 is: 3,988.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,685.92 : 5,086.65 = 2,890.20 : x
  2. Step 2: Convert to fraction form
    3,685.92/5,086.65 = 2,890.20/x
  3. Step 3: Cross multiply
    3,685.92x = 5,086.65 × 2,890.20
  4. Step 4: Simplify right side
    3,685.92x = 14,701,435.83
  5. Step 5: Solve for x
    x = 14,701,435.83/3,685.92
  6. Step 6: Final answer
    x = 3,988.54

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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.