Home / 5,105.90-7,045.71-2,867.60

Finding the Fourth Proportional to 5,105.90, 7,045.71 and 2,867.60

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Solution

The fourth proportional to 5,105.90, 7,045.71 and 2,867.60 is: 3,957.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.90 : 7,045.71 = 2,867.60 : x
  2. Step 2: Convert to fraction form
    5,105.90/7,045.71 = 2,867.60/x
  3. Step 3: Cross multiply
    5,105.90x = 7,045.71 × 2,867.60
  4. Step 4: Simplify right side
    5,105.90x = 20,204,278.00
  5. Step 5: Solve for x
    x = 20,204,278.00/5,105.90
  6. Step 6: Final answer
    x = 3,957.05

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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.