Home / 2,981.13-4,112.14-1,933.20

Finding the Fourth Proportional to 2,981.13, 4,112.14 and 1,933.20

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Solution

The fourth proportional to 2,981.13, 4,112.14 and 1,933.20 is: 2,666.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.13 : 4,112.14 = 1,933.20 : x
  2. Step 2: Convert to fraction form
    2,981.13/4,112.14 = 1,933.20/x
  3. Step 3: Cross multiply
    2,981.13x = 4,112.14 × 1,933.20
  4. Step 4: Simplify right side
    2,981.13x = 7,949,589.05
  5. Step 5: Solve for x
    x = 7,949,589.05/2,981.13
  6. Step 6: Final answer
    x = 2,666.64

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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.