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Finding the Fourth Proportional to 18,779, 28,178.22 and 9,545

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Solution

The fourth proportional to 18,779, 28,178.22 and 9,545 is: 14,322.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779 : 28,178.22 = 9,545 : x
  2. Step 2: Convert to fraction form
    18,779/28,178.22 = 9,545/x
  3. Step 3: Cross multiply
    18,779x = 28,178.22 × 9,545
  4. Step 4: Simplify right side
    18,779x = 268,961,109.90
  5. Step 5: Solve for x
    x = 268,961,109.90/18,779
  6. Step 6: Final answer
    x = 14,322.44

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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.