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Finding the Fourth Proportional to 18,162.61, 27,227.47 and 12,618.55

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Solution

The fourth proportional to 18,162.61, 27,227.47 and 12,618.55 is: 18,916.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,162.61 : 27,227.47 = 12,618.55 : x
  2. Step 2: Convert to fraction form
    18,162.61/27,227.47 = 12,618.55/x
  3. Step 3: Cross multiply
    18,162.61x = 27,227.47 × 12,618.55
  4. Step 4: Simplify right side
    18,162.61x = 343,571,191.57
  5. Step 5: Solve for x
    x = 343,571,191.57/18,162.61
  6. Step 6: Final answer
    x = 18,916.40

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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.