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Finding the Fourth Proportional to 8,678.75, 13,033.91 and 8,326.40

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Solution

The fourth proportional to 8,678.75, 13,033.91 and 8,326.40 is: 12,504.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.75 : 13,033.91 = 8,326.40 : x
  2. Step 2: Convert to fraction form
    8,678.75/13,033.91 = 8,326.40/x
  3. Step 3: Cross multiply
    8,678.75x = 13,033.91 × 8,326.40
  4. Step 4: Simplify right side
    8,678.75x = 108,525,503.87
  5. Step 5: Solve for x
    x = 108,525,503.87/8,678.75
  6. Step 6: Final answer
    x = 12,504.75

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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.