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Finding the Fourth Proportional to 5,157.36, 7,749.72 and 2,818.80

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Solution

The fourth proportional to 5,157.36, 7,749.72 and 2,818.80 is: 4,235.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.36 : 7,749.72 = 2,818.80 : x
  2. Step 2: Convert to fraction form
    5,157.36/7,749.72 = 2,818.80/x
  3. Step 3: Cross multiply
    5,157.36x = 7,749.72 × 2,818.80
  4. Step 4: Simplify right side
    5,157.36x = 21,844,910.74
  5. Step 5: Solve for x
    x = 21,844,910.74/5,157.36
  6. Step 6: Final answer
    x = 4,235.68

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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.