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Finding the Fourth Proportional to 8,276.79, 12,420.67 and 3,895.50

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Solution

The fourth proportional to 8,276.79, 12,420.67 and 3,895.50 is: 5,845.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,276.79 : 12,420.67 = 3,895.50 : x
  2. Step 2: Convert to fraction form
    8,276.79/12,420.67 = 3,895.50/x
  3. Step 3: Cross multiply
    8,276.79x = 12,420.67 × 3,895.50
  4. Step 4: Simplify right side
    8,276.79x = 48,384,719.99
  5. Step 5: Solve for x
    x = 48,384,719.99/8,276.79
  6. Step 6: Final answer
    x = 5,845.83

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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.