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Finding the Fourth Proportional to 18,806.53, 28,209.39 and 4,955.53

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Solution

The fourth proportional to 18,806.53, 28,209.39 and 4,955.53 is: 7,433.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.53 : 28,209.39 = 4,955.53 : x
  2. Step 2: Convert to fraction form
    18,806.53/28,209.39 = 4,955.53/x
  3. Step 3: Cross multiply
    18,806.53x = 28,209.39 × 4,955.53
  4. Step 4: Simplify right side
    18,806.53x = 139,792,478.43
  5. Step 5: Solve for x
    x = 139,792,478.43/18,806.53
  6. Step 6: Final answer
    x = 7,433.19

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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.