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Finding the Fourth Proportional to 5,079.60, 6,995.22 and 4,187.20

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Solution

The fourth proportional to 5,079.60, 6,995.22 and 4,187.20 is: 5,766.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,079.60 : 6,995.22 = 4,187.20 : x
  2. Step 2: Convert to fraction form
    5,079.60/6,995.22 = 4,187.20/x
  3. Step 3: Cross multiply
    5,079.60x = 6,995.22 × 4,187.20
  4. Step 4: Simplify right side
    5,079.60x = 29,290,388.66
  5. Step 5: Solve for x
    x = 29,290,388.66/5,079.60
  6. Step 6: Final answer
    x = 5,766.28

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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.