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Finding the Fourth Proportional to 18,876.54, 28,314.66 and 4,836.54

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Solution

The fourth proportional to 18,876.54, 28,314.66 and 4,836.54 is: 7,254.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876.54 : 28,314.66 = 4,836.54 : x
  2. Step 2: Convert to fraction form
    18,876.54/28,314.66 = 4,836.54/x
  3. Step 3: Cross multiply
    18,876.54x = 28,314.66 × 4,836.54
  4. Step 4: Simplify right side
    18,876.54x = 136,944,985.68
  5. Step 5: Solve for x
    x = 136,944,985.68/18,876.54
  6. Step 6: Final answer
    x = 7,254.77

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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.