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Finding the Fourth Proportional to 19,187.92, 28,759.92 and 8,077.96

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Solution

The fourth proportional to 19,187.92, 28,759.92 and 8,077.96 is: 12,107.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,187.92 : 28,759.92 = 8,077.96 : x
  2. Step 2: Convert to fraction form
    19,187.92/28,759.92 = 8,077.96/x
  3. Step 3: Cross multiply
    19,187.92x = 28,759.92 × 8,077.96
  4. Step 4: Simplify right side
    19,187.92x = 232,321,483.36
  5. Step 5: Solve for x
    x = 232,321,483.36/19,187.92
  6. Step 6: Final answer
    x = 12,107.70

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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.