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Finding the Fourth Proportional to 30,137, 45,205.50 and 11,669

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Solution

The fourth proportional to 30,137, 45,205.50 and 11,669 is: 17,503.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,137 : 45,205.50 = 11,669 : x
  2. Step 2: Convert to fraction form
    30,137/45,205.50 = 11,669/x
  3. Step 3: Cross multiply
    30,137x = 45,205.50 × 11,669
  4. Step 4: Simplify right side
    30,137x = 527,502,979.50
  5. Step 5: Solve for x
    x = 527,502,979.50/30,137
  6. Step 6: Final answer
    x = 17,503.50

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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.