Home / 2,681.64-4,021.12-1,121.18

Finding the Fourth Proportional to 2,681.64, 4,021.12 and 1,121.18

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Solution

The fourth proportional to 2,681.64, 4,021.12 and 1,121.18 is: 1,681.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.64 : 4,021.12 = 1,121.18 : x
  2. Step 2: Convert to fraction form
    2,681.64/4,021.12 = 1,121.18/x
  3. Step 3: Cross multiply
    2,681.64x = 4,021.12 × 1,121.18
  4. Step 4: Simplify right side
    2,681.64x = 4,508,399.32
  5. Step 5: Solve for x
    x = 4,508,399.32/2,681.64
  6. Step 6: Final answer
    x = 1,681.21

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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.