Home / 3,890.87-5,836.58-1,917.55

Finding the Fourth Proportional to 3,890.87, 5,836.58 and 1,917.55

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Solution

The fourth proportional to 3,890.87, 5,836.58 and 1,917.55 is: 2,876.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.87 : 5,836.58 = 1,917.55 : x
  2. Step 2: Convert to fraction form
    3,890.87/5,836.58 = 1,917.55/x
  3. Step 3: Cross multiply
    3,890.87x = 5,836.58 × 1,917.55
  4. Step 4: Simplify right side
    3,890.87x = 11,191,933.98
  5. Step 5: Solve for x
    x = 11,191,933.98/3,890.87
  6. Step 6: Final answer
    x = 2,876.46

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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.