Home / 2,869.60-3,956.82-1,986.04

Finding the Fourth Proportional to 2,869.60, 3,956.82 and 1,986.04

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Solution

The fourth proportional to 2,869.60, 3,956.82 and 1,986.04 is: 2,738.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.60 : 3,956.82 = 1,986.04 : x
  2. Step 2: Convert to fraction form
    2,869.60/3,956.82 = 1,986.04/x
  3. Step 3: Cross multiply
    2,869.60x = 3,956.82 × 1,986.04
  4. Step 4: Simplify right side
    2,869.60x = 7,858,402.79
  5. Step 5: Solve for x
    x = 7,858,402.79/2,869.60
  6. Step 6: Final answer
    x = 2,738.50

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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.