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Finding the Fourth Proportional to 8,265.69, 12,399.21 and 3,880.76

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Solution

The fourth proportional to 8,265.69, 12,399.21 and 3,880.76 is: 5,821.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,265.69 : 12,399.21 = 3,880.76 : x
  2. Step 2: Convert to fraction form
    8,265.69/12,399.21 = 3,880.76/x
  3. Step 3: Cross multiply
    8,265.69x = 12,399.21 × 3,880.76
  4. Step 4: Simplify right side
    8,265.69x = 48,118,296.20
  5. Step 5: Solve for x
    x = 48,118,296.20/8,265.69
  6. Step 6: Final answer
    x = 5,821.45

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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.