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Finding the Fourth Proportional to 19,138.56, 26,404.68 and 11,963.56

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Solution

The fourth proportional to 19,138.56, 26,404.68 and 11,963.56 is: 16,505.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.56 : 26,404.68 = 11,963.56 : x
  2. Step 2: Convert to fraction form
    19,138.56/26,404.68 = 11,963.56/x
  3. Step 3: Cross multiply
    19,138.56x = 26,404.68 × 11,963.56
  4. Step 4: Simplify right side
    19,138.56x = 315,893,973.46
  5. Step 5: Solve for x
    x = 315,893,973.46/19,138.56
  6. Step 6: Final answer
    x = 16,505.63

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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.