Home / 2,107.10-3,162.45-938.90

Finding the Fourth Proportional to 2,107.10, 3,162.45 and 938.90

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Solution

The fourth proportional to 2,107.10, 3,162.45 and 938.90 is: 1,409.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.10 : 3,162.45 = 938.90 : x
  2. Step 2: Convert to fraction form
    2,107.10/3,162.45 = 938.90/x
  3. Step 3: Cross multiply
    2,107.10x = 3,162.45 × 938.90
  4. Step 4: Simplify right side
    2,107.10x = 2,969,224.31
  5. Step 5: Solve for x
    x = 2,969,224.31/2,107.10
  6. Step 6: Final answer
    x = 1,409.15

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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.