Home / 2,639.36-3,636.96-1,939.52

Finding the Fourth Proportional to 2,639.36, 3,636.96 and 1,939.52

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Solution

The fourth proportional to 2,639.36, 3,636.96 and 1,939.52 is: 2,672.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.36 : 3,636.96 = 1,939.52 : x
  2. Step 2: Convert to fraction form
    2,639.36/3,636.96 = 1,939.52/x
  3. Step 3: Cross multiply
    2,639.36x = 3,636.96 × 1,939.52
  4. Step 4: Simplify right side
    2,639.36x = 7,053,956.66
  5. Step 5: Solve for x
    x = 7,053,956.66/2,639.36
  6. Step 6: Final answer
    x = 2,672.60

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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.