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Finding the Fourth Proportional to 12,658.87, 18,988.31 and 4,869.51

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Solution

The fourth proportional to 12,658.87, 18,988.31 and 4,869.51 is: 7,304.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.87 : 18,988.31 = 4,869.51 : x
  2. Step 2: Convert to fraction form
    12,658.87/18,988.31 = 4,869.51/x
  3. Step 3: Cross multiply
    12,658.87x = 18,988.31 × 4,869.51
  4. Step 4: Simplify right side
    12,658.87x = 92,463,765.43
  5. Step 5: Solve for x
    x = 92,463,765.43/12,658.87
  6. Step 6: Final answer
    x = 7,304.27

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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.