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Finding the Fourth Proportional to 13,805.92, 19,059.28 and 8,503.84

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Solution

The fourth proportional to 13,805.92, 19,059.28 and 8,503.84 is: 11,739.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,805.92 : 19,059.28 = 8,503.84 : x
  2. Step 2: Convert to fraction form
    13,805.92/19,059.28 = 8,503.84/x
  3. Step 3: Cross multiply
    13,805.92x = 19,059.28 × 8,503.84
  4. Step 4: Simplify right side
    13,805.92x = 162,077,067.64
  5. Step 5: Solve for x
    x = 162,077,067.64/13,805.92
  6. Step 6: Final answer
    x = 11,739.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.