Home / 2,990.92-4,126.53-2,107.21

Finding the Fourth Proportional to 2,990.92, 4,126.53 and 2,107.21

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Solution

The fourth proportional to 2,990.92, 4,126.53 and 2,107.21 is: 2,907.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.92 : 4,126.53 = 2,107.21 : x
  2. Step 2: Convert to fraction form
    2,990.92/4,126.53 = 2,107.21/x
  3. Step 3: Cross multiply
    2,990.92x = 4,126.53 × 2,107.21
  4. Step 4: Simplify right side
    2,990.92x = 8,695,465.28
  5. Step 5: Solve for x
    x = 8,695,465.28/2,990.92
  6. Step 6: Final answer
    x = 2,907.29

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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.