Home / 2,642.18-3,642.84-2,168.36

Finding the Fourth Proportional to 2,642.18, 3,642.84 and 2,168.36

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Solution

The fourth proportional to 2,642.18, 3,642.84 and 2,168.36 is: 2,989.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.18 : 3,642.84 = 2,168.36 : x
  2. Step 2: Convert to fraction form
    2,642.18/3,642.84 = 2,168.36/x
  3. Step 3: Cross multiply
    2,642.18x = 3,642.84 × 2,168.36
  4. Step 4: Simplify right side
    2,642.18x = 7,898,988.54
  5. Step 5: Solve for x
    x = 7,898,988.54/2,642.18
  6. Step 6: Final answer
    x = 2,989.57

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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.