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Finding the Fourth Proportional to 19,007.75, 28,511.73 and 5,156.75

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Solution

The fourth proportional to 19,007.75, 28,511.73 and 5,156.75 is: 7,735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,007.75 : 28,511.73 = 5,156.75 : x
  2. Step 2: Convert to fraction form
    19,007.75/28,511.73 = 5,156.75/x
  3. Step 3: Cross multiply
    19,007.75x = 28,511.73 × 5,156.75
  4. Step 4: Simplify right side
    19,007.75x = 147,027,863.68
  5. Step 5: Solve for x
    x = 147,027,863.68/19,007.75
  6. Step 6: Final answer
    x = 7,735.15

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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.