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Finding the Fourth Proportional to 18,754.92, 28,104.12 and 12,492.84

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Solution

The fourth proportional to 18,754.92, 28,104.12 and 12,492.84 is: 18,720.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.92 : 28,104.12 = 12,492.84 : x
  2. Step 2: Convert to fraction form
    18,754.92/28,104.12 = 12,492.84/x
  3. Step 3: Cross multiply
    18,754.92x = 28,104.12 × 12,492.84
  4. Step 4: Simplify right side
    18,754.92x = 351,100,274.50
  5. Step 5: Solve for x
    x = 351,100,274.50/18,754.92
  6. Step 6: Final answer
    x = 18,720.44

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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.