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Finding the Fourth Proportional to 18,792.81, 28,184.36 and 8,912.43

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Solution

The fourth proportional to 18,792.81, 28,184.36 and 8,912.43 is: 13,366.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792.81 : 28,184.36 = 8,912.43 : x
  2. Step 2: Convert to fraction form
    18,792.81/28,184.36 = 8,912.43/x
  3. Step 3: Cross multiply
    18,792.81x = 28,184.36 × 8,912.43
  4. Step 4: Simplify right side
    18,792.81x = 251,191,091.03
  5. Step 5: Solve for x
    x = 251,191,091.03/18,792.81
  6. Step 6: Final answer
    x = 13,366.34

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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.