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Finding the Fourth Proportional to 13,611.06, 18,778.38 and 8,898.06

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Solution

The fourth proportional to 13,611.06, 18,778.38 and 8,898.06 is: 12,276.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.06 : 18,778.38 = 8,898.06 : x
  2. Step 2: Convert to fraction form
    13,611.06/18,778.38 = 8,898.06/x
  3. Step 3: Cross multiply
    13,611.06x = 18,778.38 × 8,898.06
  4. Step 4: Simplify right side
    13,611.06x = 167,091,151.94
  5. Step 5: Solve for x
    x = 167,091,151.94/13,611.06
  6. Step 6: Final answer
    x = 12,276.13

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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.