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Finding the Fourth Proportional to 18,806.25, 28,209.38 and 4,955.25

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Solution

The fourth proportional to 18,806.25, 28,209.38 and 4,955.25 is: 7,432.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.25 : 28,209.38 = 4,955.25 : x
  2. Step 2: Convert to fraction form
    18,806.25/28,209.38 = 4,955.25/x
  3. Step 3: Cross multiply
    18,806.25x = 28,209.38 × 4,955.25
  4. Step 4: Simplify right side
    18,806.25x = 139,784,505.47
  5. Step 5: Solve for x
    x = 139,784,505.47/18,806.25
  6. Step 6: Final answer
    x = 7,432.88

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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.