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Finding the Fourth Proportional to 18,377.64, 27,539.87 and 12,672.79

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Solution

The fourth proportional to 18,377.64, 27,539.87 and 12,672.79 is: 18,990.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,377.64 : 27,539.87 = 12,672.79 : x
  2. Step 2: Convert to fraction form
    18,377.64/27,539.87 = 12,672.79/x
  3. Step 3: Cross multiply
    18,377.64x = 27,539.87 × 12,672.79
  4. Step 4: Simplify right side
    18,377.64x = 349,006,856.92
  5. Step 5: Solve for x
    x = 349,006,856.92/18,377.64
  6. Step 6: Final answer
    x = 18,990.84

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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.