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Finding the Fourth Proportional to 8,628.59, 12,955.84 and 4,934.99

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Solution

The fourth proportional to 8,628.59, 12,955.84 and 4,934.99 is: 7,409.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.59 : 12,955.84 = 4,934.99 : x
  2. Step 2: Convert to fraction form
    8,628.59/12,955.84 = 4,934.99/x
  3. Step 3: Cross multiply
    8,628.59x = 12,955.84 × 4,934.99
  4. Step 4: Simplify right side
    8,628.59x = 63,936,863.72
  5. Step 5: Solve for x
    x = 63,936,863.72/8,628.59
  6. Step 6: Final answer
    x = 7,409.89

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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.