Home / 2,790.09-3,850.18-1,531.13

Finding the Fourth Proportional to 2,790.09, 3,850.18 and 1,531.13

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Solution

The fourth proportional to 2,790.09, 3,850.18 and 1,531.13 is: 2,112.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.09 : 3,850.18 = 1,531.13 : x
  2. Step 2: Convert to fraction form
    2,790.09/3,850.18 = 1,531.13/x
  3. Step 3: Cross multiply
    2,790.09x = 3,850.18 × 1,531.13
  4. Step 4: Simplify right side
    2,790.09x = 5,895,123.20
  5. Step 5: Solve for x
    x = 5,895,123.20/2,790.09
  6. Step 6: Final answer
    x = 2,112.88

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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.