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Finding the Fourth Proportional to 18,685.69, 28,028.63 and 4,834.69

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Solution

The fourth proportional to 18,685.69, 28,028.63 and 4,834.69 is: 7,252.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.69 : 28,028.63 = 4,834.69 : x
  2. Step 2: Convert to fraction form
    18,685.69/28,028.63 = 4,834.69/x
  3. Step 3: Cross multiply
    18,685.69x = 28,028.63 × 4,834.69
  4. Step 4: Simplify right side
    18,685.69x = 135,509,679.19
  5. Step 5: Solve for x
    x = 135,509,679.19/18,685.69
  6. Step 6: Final answer
    x = 7,252.06

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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.