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Finding the Fourth Proportional to 13,696.98, 18,904.88 and 8,908.60

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Solution

The fourth proportional to 13,696.98, 18,904.88 and 8,908.60 is: 12,295.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,696.98 : 18,904.88 = 8,908.60 : x
  2. Step 2: Convert to fraction form
    13,696.98/18,904.88 = 8,908.60/x
  3. Step 3: Cross multiply
    13,696.98x = 18,904.88 × 8,908.60
  4. Step 4: Simplify right side
    13,696.98x = 168,416,013.97
  5. Step 5: Solve for x
    x = 168,416,013.97/13,696.98
  6. Step 6: Final answer
    x = 12,295.85

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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.