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Finding the Fourth Proportional to 6,420.47, 8,860.48 and 3,768.73

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Solution

The fourth proportional to 6,420.47, 8,860.48 and 3,768.73 is: 5,200.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.47 : 8,860.48 = 3,768.73 : x
  2. Step 2: Convert to fraction form
    6,420.47/8,860.48 = 3,768.73/x
  3. Step 3: Cross multiply
    6,420.47x = 8,860.48 × 3,768.73
  4. Step 4: Simplify right side
    6,420.47x = 33,392,796.26
  5. Step 5: Solve for x
    x = 33,392,796.26/6,420.47
  6. Step 6: Final answer
    x = 5,200.99

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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.