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Finding the Fourth Proportional to 18,778, 28,167 and 4,927

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Solution

The fourth proportional to 18,778, 28,167 and 4,927 is: 7,390.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778 : 28,167 = 4,927 : x
  2. Step 2: Convert to fraction form
    18,778/28,167 = 4,927/x
  3. Step 3: Cross multiply
    18,778x = 28,167 × 4,927
  4. Step 4: Simplify right side
    18,778x = 138,778,809
  5. Step 5: Solve for x
    x = 138,778,809/18,778
  6. Step 6: Final answer
    x = 7,390.50

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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.