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Finding the Fourth Proportional to 12,805.69, 19,179.04 and 12,362.43

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Solution

The fourth proportional to 12,805.69, 19,179.04 and 12,362.43 is: 18,515.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,805.69 : 19,179.04 = 12,362.43 : x
  2. Step 2: Convert to fraction form
    12,805.69/19,179.04 = 12,362.43/x
  3. Step 3: Cross multiply
    12,805.69x = 19,179.04 × 12,362.43
  4. Step 4: Simplify right side
    12,805.69x = 237,099,539.47
  5. Step 5: Solve for x
    x = 237,099,539.47/12,805.69
  6. Step 6: Final answer
    x = 18,515.17

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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.