Home / 5,218.20-7,208.02-3,889.60

Finding the Fourth Proportional to 5,218.20, 7,208.02 and 3,889.60

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Solution

The fourth proportional to 5,218.20, 7,208.02 and 3,889.60 is: 5,372.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.20 : 7,208.02 = 3,889.60 : x
  2. Step 2: Convert to fraction form
    5,218.20/7,208.02 = 3,889.60/x
  3. Step 3: Cross multiply
    5,218.20x = 7,208.02 × 3,889.60
  4. Step 4: Simplify right side
    5,218.20x = 28,036,259.10
  5. Step 5: Solve for x
    x = 28,036,259.10/5,218.20
  6. Step 6: Final answer
    x = 5,372.78

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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.