Home / 3,815.45-5,265.25-2,113.80

Finding the Fourth Proportional to 3,815.45, 5,265.25 and 2,113.80

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Solution

The fourth proportional to 3,815.45, 5,265.25 and 2,113.80 is: 2,917.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.45 : 5,265.25 = 2,113.80 : x
  2. Step 2: Convert to fraction form
    3,815.45/5,265.25 = 2,113.80/x
  3. Step 3: Cross multiply
    3,815.45x = 5,265.25 × 2,113.80
  4. Step 4: Simplify right side
    3,815.45x = 11,129,672.31
  5. Step 5: Solve for x
    x = 11,129,672.31/3,815.45
  6. Step 6: Final answer
    x = 2,917.00

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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.