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Finding the Fourth Proportional to 18,677.51, 28,013.02 and 4,826.51

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Solution

The fourth proportional to 18,677.51, 28,013.02 and 4,826.51 is: 7,238.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,677.51 : 28,013.02 = 4,826.51 : x
  2. Step 2: Convert to fraction form
    18,677.51/28,013.02 = 4,826.51/x
  3. Step 3: Cross multiply
    18,677.51x = 28,013.02 × 4,826.51
  4. Step 4: Simplify right side
    18,677.51x = 135,204,969.03
  5. Step 5: Solve for x
    x = 135,204,969.03/18,677.51
  6. Step 6: Final answer
    x = 7,238.92

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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.