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Finding the Fourth Proportional to 18,685.89, 28,028.94 and 4,834.89

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Solution

The fourth proportional to 18,685.89, 28,028.94 and 4,834.89 is: 7,252.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.89 : 28,028.94 = 4,834.89 : x
  2. Step 2: Convert to fraction form
    18,685.89/28,028.94 = 4,834.89/x
  3. Step 3: Cross multiply
    18,685.89x = 28,028.94 × 4,834.89
  4. Step 4: Simplify right side
    18,685.89x = 135,516,847.15
  5. Step 5: Solve for x
    x = 135,516,847.15/18,685.89
  6. Step 6: Final answer
    x = 7,252.36

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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.