Home / 3,091.60-4,266.10-1,912.72

Finding the Fourth Proportional to 3,091.60, 4,266.10 and 1,912.72

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Solution

The fourth proportional to 3,091.60, 4,266.10 and 1,912.72 is: 2,639.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,091.60 : 4,266.10 = 1,912.72 : x
  2. Step 2: Convert to fraction form
    3,091.60/4,266.10 = 1,912.72/x
  3. Step 3: Cross multiply
    3,091.60x = 4,266.10 × 1,912.72
  4. Step 4: Simplify right side
    3,091.60x = 8,159,854.79
  5. Step 5: Solve for x
    x = 8,159,854.79/3,091.60
  6. Step 6: Final answer
    x = 2,639.36

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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.