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Finding the Fourth Proportional to 5,221.56, 7,827.30 and 2,616.60

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Solution

The fourth proportional to 5,221.56, 7,827.30 and 2,616.60 is: 3,922.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.56 : 7,827.30 = 2,616.60 : x
  2. Step 2: Convert to fraction form
    5,221.56/7,827.30 = 2,616.60/x
  3. Step 3: Cross multiply
    5,221.56x = 7,827.30 × 2,616.60
  4. Step 4: Simplify right side
    5,221.56x = 20,480,913.18
  5. Step 5: Solve for x
    x = 20,480,913.18/5,221.56
  6. Step 6: Final answer
    x = 3,922.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.