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Finding the Fourth Proportional to 8,628.21, 12,955.28 and 4,934.61

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Solution

The fourth proportional to 8,628.21, 12,955.28 and 4,934.61 is: 7,409.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.21 : 12,955.28 = 4,934.61 : x
  2. Step 2: Convert to fraction form
    8,628.21/12,955.28 = 4,934.61/x
  3. Step 3: Cross multiply
    8,628.21x = 12,955.28 × 4,934.61
  4. Step 4: Simplify right side
    8,628.21x = 63,929,229.57
  5. Step 5: Solve for x
    x = 63,929,229.57/8,628.21
  6. Step 6: Final answer
    x = 7,409.33

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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.