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Finding the Fourth Proportional to 12,611.12, 18,916.66 and 12,592.88

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Solution

The fourth proportional to 12,611.12, 18,916.66 and 12,592.88 is: 18,889.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.12 : 18,916.66 = 12,592.88 : x
  2. Step 2: Convert to fraction form
    12,611.12/18,916.66 = 12,592.88/x
  3. Step 3: Cross multiply
    12,611.12x = 18,916.66 × 12,592.88
  4. Step 4: Simplify right side
    12,611.12x = 238,215,229.38
  5. Step 5: Solve for x
    x = 238,215,229.38/12,611.12
  6. Step 6: Final answer
    x = 18,889.30

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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.