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Finding the Fourth Proportional to 8,203.60, 12,289.20 and 4,906.90

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Solution

The fourth proportional to 8,203.60, 12,289.20 and 4,906.90 is: 7,350.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,203.60 : 12,289.20 = 4,906.90 : x
  2. Step 2: Convert to fraction form
    8,203.60/12,289.20 = 4,906.90/x
  3. Step 3: Cross multiply
    8,203.60x = 12,289.20 × 4,906.90
  4. Step 4: Simplify right side
    8,203.60x = 60,301,875.48
  5. Step 5: Solve for x
    x = 60,301,875.48/8,203.60
  6. Step 6: Final answer
    x = 7,350.66

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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.