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Finding the Fourth Proportional to 19,300, 28,950 and 5,449

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Solution

The fourth proportional to 19,300, 28,950 and 5,449 is: 8,173.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,300 : 28,950 = 5,449 : x
  2. Step 2: Convert to fraction form
    19,300/28,950 = 5,449/x
  3. Step 3: Cross multiply
    19,300x = 28,950 × 5,449
  4. Step 4: Simplify right side
    19,300x = 157,748,550
  5. Step 5: Solve for x
    x = 157,748,550/19,300
  6. Step 6: Final answer
    x = 8,173.50

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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.