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Finding the Fourth Proportional to 18,716.63, 28,076.76 and 4,865.63

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Solution

The fourth proportional to 18,716.63, 28,076.76 and 4,865.63 is: 7,298.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.63 : 28,076.76 = 4,865.63 : x
  2. Step 2: Convert to fraction form
    18,716.63/28,076.76 = 4,865.63/x
  3. Step 3: Cross multiply
    18,716.63x = 28,076.76 × 4,865.63
  4. Step 4: Simplify right side
    18,716.63x = 136,610,985.38
  5. Step 5: Solve for x
    x = 136,610,985.38/18,716.63
  6. Step 6: Final answer
    x = 7,298.91

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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.