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Finding the Fourth Proportional to 8,243.55, 12,365.90 and 3,313.20

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Solution

The fourth proportional to 8,243.55, 12,365.90 and 3,313.20 is: 4,970.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,243.55 : 12,365.90 = 3,313.20 : x
  2. Step 2: Convert to fraction form
    8,243.55/12,365.90 = 3,313.20/x
  3. Step 3: Cross multiply
    8,243.55x = 12,365.90 × 3,313.20
  4. Step 4: Simplify right side
    8,243.55x = 40,970,629.77
  5. Step 5: Solve for x
    x = 40,970,629.77/8,243.55
  6. Step 6: Final answer
    x = 4,970.02

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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.