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Finding the Fourth Proportional to 18,940.92, 28,411.36 and 5,089.92

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Solution

The fourth proportional to 18,940.92, 28,411.36 and 5,089.92 is: 7,634.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.92 : 28,411.36 = 5,089.92 : x
  2. Step 2: Convert to fraction form
    18,940.92/28,411.36 = 5,089.92/x
  3. Step 3: Cross multiply
    18,940.92x = 28,411.36 × 5,089.92
  4. Step 4: Simplify right side
    18,940.92x = 144,611,549.49
  5. Step 5: Solve for x
    x = 144,611,549.49/18,940.92
  6. Step 6: Final answer
    x = 7,634.87

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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.