Home / 2,639.16-3,640.68-2,142.36

Finding the Fourth Proportional to 2,639.16, 3,640.68 and 2,142.36

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Solution

The fourth proportional to 2,639.16, 3,640.68 and 2,142.36 is: 2,955.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.16 : 3,640.68 = 2,142.36 : x
  2. Step 2: Convert to fraction form
    2,639.16/3,640.68 = 2,142.36/x
  3. Step 3: Cross multiply
    2,639.16x = 3,640.68 × 2,142.36
  4. Step 4: Simplify right side
    2,639.16x = 7,799,647.20
  5. Step 5: Solve for x
    x = 7,799,647.20/2,639.16
  6. Step 6: Final answer
    x = 2,955.35

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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.