Home / 4,977.72-6,869.45-2,739.78

Finding the Fourth Proportional to 4,977.72, 6,869.45 and 2,739.78

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Solution

The fourth proportional to 4,977.72, 6,869.45 and 2,739.78 is: 3,781.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,977.72 : 6,869.45 = 2,739.78 : x
  2. Step 2: Convert to fraction form
    4,977.72/6,869.45 = 2,739.78/x
  3. Step 3: Cross multiply
    4,977.72x = 6,869.45 × 2,739.78
  4. Step 4: Simplify right side
    4,977.72x = 18,820,781.72
  5. Step 5: Solve for x
    x = 18,820,781.72/4,977.72
  6. Step 6: Final answer
    x = 3,781.00

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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.