Home / 3,106.09-4,287.38-1,911.45

Finding the Fourth Proportional to 3,106.09, 4,287.38 and 1,911.45

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Solution

The fourth proportional to 3,106.09, 4,287.38 and 1,911.45 is: 2,638.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.09 : 4,287.38 = 1,911.45 : x
  2. Step 2: Convert to fraction form
    3,106.09/4,287.38 = 1,911.45/x
  3. Step 3: Cross multiply
    3,106.09x = 4,287.38 × 1,911.45
  4. Step 4: Simplify right side
    3,106.09x = 8,195,112.50
  5. Step 5: Solve for x
    x = 8,195,112.50/3,106.09
  6. Step 6: Final answer
    x = 2,638.40

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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.