Home / 12,137-18,208.70-3,929.64

Finding the Fourth Proportional to 12,137, 18,208.70 and 3,929.64

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Solution

The fourth proportional to 12,137, 18,208.70 and 3,929.64 is: 5,895.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,137 : 18,208.70 = 3,929.64 : x
  2. Step 2: Convert to fraction form
    12,137/18,208.70 = 3,929.64/x
  3. Step 3: Cross multiply
    12,137x = 18,208.70 × 3,929.64
  4. Step 4: Simplify right side
    12,137x = 71,553,635.87
  5. Step 5: Solve for x
    x = 71,553,635.87/12,137
  6. Step 6: Final answer
    x = 5,895.50

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1.5x scale

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.