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Finding the Fourth Proportional to 19,008.10, 28,512.15 and 7,911.10

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Solution

The fourth proportional to 19,008.10, 28,512.15 and 7,911.10 is: 11,866.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,008.10 : 28,512.15 = 7,911.10 : x
  2. Step 2: Convert to fraction form
    19,008.10/28,512.15 = 7,911.10/x
  3. Step 3: Cross multiply
    19,008.10x = 28,512.15 × 7,911.10
  4. Step 4: Simplify right side
    19,008.10x = 225,562,469.87
  5. Step 5: Solve for x
    x = 225,562,469.87/19,008.10
  6. Step 6: Final answer
    x = 11,866.65

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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.