Home / 2,851.16-3,928.76-2,103.92

Finding the Fourth Proportional to 2,851.16, 3,928.76 and 2,103.92

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Solution

The fourth proportional to 2,851.16, 3,928.76 and 2,103.92 is: 2,899.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,851.16 : 3,928.76 = 2,103.92 : x
  2. Step 2: Convert to fraction form
    2,851.16/3,928.76 = 2,103.92/x
  3. Step 3: Cross multiply
    2,851.16x = 3,928.76 × 2,103.92
  4. Step 4: Simplify right side
    2,851.16x = 8,265,796.74
  5. Step 5: Solve for x
    x = 8,265,796.74/2,851.16
  6. Step 6: Final answer
    x = 2,899.10

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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.