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Finding the Fourth Proportional to 18,866.64, 28,300.22 and 4,826.78

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Solution

The fourth proportional to 18,866.64, 28,300.22 and 4,826.78 is: 7,240.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.64 : 28,300.22 = 4,826.78 : x
  2. Step 2: Convert to fraction form
    18,866.64/28,300.22 = 4,826.78/x
  3. Step 3: Cross multiply
    18,866.64x = 28,300.22 × 4,826.78
  4. Step 4: Simplify right side
    18,866.64x = 136,598,770.26
  5. Step 5: Solve for x
    x = 136,598,770.26/18,866.64
  6. Step 6: Final answer
    x = 7,240.23

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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.