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Finding the Fourth Proportional to 39,138, 58,694.68 and 12,836.62

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Solution

The fourth proportional to 39,138, 58,694.68 and 12,836.62 is: 19,250.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138 : 58,694.68 = 12,836.62 : x
  2. Step 2: Convert to fraction form
    39,138/58,694.68 = 12,836.62/x
  3. Step 3: Cross multiply
    39,138x = 58,694.68 × 12,836.62
  4. Step 4: Simplify right side
    39,138x = 753,441,303.18
  5. Step 5: Solve for x
    x = 753,441,303.18/39,138
  6. Step 6: Final answer
    x = 19,250.89

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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.