Home / 2,728.72-4,089.58-1,986.45

Finding the Fourth Proportional to 2,728.72, 4,089.58 and 1,986.45

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Solution

The fourth proportional to 2,728.72, 4,089.58 and 1,986.45 is: 2,977.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.72 : 4,089.58 = 1,986.45 : x
  2. Step 2: Convert to fraction form
    2,728.72/4,089.58 = 1,986.45/x
  3. Step 3: Cross multiply
    2,728.72x = 4,089.58 × 1,986.45
  4. Step 4: Simplify right side
    2,728.72x = 8,123,746.19
  5. Step 5: Solve for x
    x = 8,123,746.19/2,728.72
  6. Step 6: Final answer
    x = 2,977.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.