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Finding the Fourth Proportional to 8,628.24, 12,942.48 and 3,694.80

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Solution

The fourth proportional to 8,628.24, 12,942.48 and 3,694.80 is: 5,542.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.24 : 12,942.48 = 3,694.80 : x
  2. Step 2: Convert to fraction form
    8,628.24/12,942.48 = 3,694.80/x
  3. Step 3: Cross multiply
    8,628.24x = 12,942.48 × 3,694.80
  4. Step 4: Simplify right side
    8,628.24x = 47,819,875.10
  5. Step 5: Solve for x
    x = 47,819,875.10/8,628.24
  6. Step 6: Final answer
    x = 5,542.25

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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.