Home / 2,781.72-3,836.70-2,038.68

Finding the Fourth Proportional to 2,781.72, 3,836.70 and 2,038.68

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Solution

The fourth proportional to 2,781.72, 3,836.70 and 2,038.68 is: 2,811.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.72 : 3,836.70 = 2,038.68 : x
  2. Step 2: Convert to fraction form
    2,781.72/3,836.70 = 2,038.68/x
  3. Step 3: Cross multiply
    2,781.72x = 3,836.70 × 2,038.68
  4. Step 4: Simplify right side
    2,781.72x = 7,821,803.56
  5. Step 5: Solve for x
    x = 7,821,803.56/2,781.72
  6. Step 6: Final answer
    x = 2,811.86

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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.