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Finding the Fourth Proportional to 3,772.72, 5,205 and 2,116.72

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Solution

The fourth proportional to 3,772.72, 5,205 and 2,116.72 is: 2,920.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,772.72 : 5,205 = 2,116.72 : x
  2. Step 2: Convert to fraction form
    3,772.72/5,205 = 2,116.72/x
  3. Step 3: Cross multiply
    3,772.72x = 5,205 × 2,116.72
  4. Step 4: Simplify right side
    3,772.72x = 11,017,527.60
  5. Step 5: Solve for x
    x = 11,017,527.60/3,772.72
  6. Step 6: Final answer
    x = 2,920.31

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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.