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Finding the Fourth Proportional to 8,604.40, 12,905.18 and 2,760.25

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Solution

The fourth proportional to 8,604.40, 12,905.18 and 2,760.25 is: 4,139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,604.40 : 12,905.18 = 2,760.25 : x
  2. Step 2: Convert to fraction form
    8,604.40/12,905.18 = 2,760.25/x
  3. Step 3: Cross multiply
    8,604.40x = 12,905.18 × 2,760.25
  4. Step 4: Simplify right side
    8,604.40x = 35,621,523.10
  5. Step 5: Solve for x
    x = 35,621,523.10/8,604.40
  6. Step 6: Final answer
    x = 4,139.92

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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.