Home / 2,761.55-3,811.47-1,815.68

Finding the Fourth Proportional to 2,761.55, 3,811.47 and 1,815.68

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Solution

The fourth proportional to 2,761.55, 3,811.47 and 1,815.68 is: 2,505.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.55 : 3,811.47 = 1,815.68 : x
  2. Step 2: Convert to fraction form
    2,761.55/3,811.47 = 1,815.68/x
  3. Step 3: Cross multiply
    2,761.55x = 3,811.47 × 1,815.68
  4. Step 4: Simplify right side
    2,761.55x = 6,920,390.79
  5. Step 5: Solve for x
    x = 6,920,390.79/2,761.55
  6. Step 6: Final answer
    x = 2,505.98

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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.