Home / 2,112.40-3,168.87-1,138.06

Finding the Fourth Proportional to 2,112.40, 3,168.87 and 1,138.06

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Solution

The fourth proportional to 2,112.40, 3,168.87 and 1,138.06 is: 1,707.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.40 : 3,168.87 = 1,138.06 : x
  2. Step 2: Convert to fraction form
    2,112.40/3,168.87 = 1,138.06/x
  3. Step 3: Cross multiply
    2,112.40x = 3,168.87 × 1,138.06
  4. Step 4: Simplify right side
    2,112.40x = 3,606,364.19
  5. Step 5: Solve for x
    x = 3,606,364.19/2,112.40
  6. Step 6: Final answer
    x = 1,707.24

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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.