Home / 3,106.11-4,283.48-1,987.40

Finding the Fourth Proportional to 3,106.11, 4,283.48 and 1,987.40

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Solution

The fourth proportional to 3,106.11, 4,283.48 and 1,987.40 is: 2,740.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.11 : 4,283.48 = 1,987.40 : x
  2. Step 2: Convert to fraction form
    3,106.11/4,283.48 = 1,987.40/x
  3. Step 3: Cross multiply
    3,106.11x = 4,283.48 × 1,987.40
  4. Step 4: Simplify right side
    3,106.11x = 8,512,956.80
  5. Step 5: Solve for x
    x = 8,512,956.80/3,106.11
  6. Step 6: Final answer
    x = 2,740.71

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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.