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Finding the Fourth Proportional to 15,469.62, 21,346.74 and 8,755.50

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Solution

The fourth proportional to 15,469.62, 21,346.74 and 8,755.50 is: 12,081.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,469.62 : 21,346.74 = 8,755.50 : x
  2. Step 2: Convert to fraction form
    15,469.62/21,346.74 = 8,755.50/x
  3. Step 3: Cross multiply
    15,469.62x = 21,346.74 × 8,755.50
  4. Step 4: Simplify right side
    15,469.62x = 186,901,382.07
  5. Step 5: Solve for x
    x = 186,901,382.07/15,469.62
  6. Step 6: Final answer
    x = 12,081.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.