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Finding the Fourth Proportional to 19,603.52, 27,042.72 and 12,138.56

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Solution

The fourth proportional to 19,603.52, 27,042.72 and 12,138.56 is: 16,744.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,603.52 : 27,042.72 = 12,138.56 : x
  2. Step 2: Convert to fraction form
    19,603.52/27,042.72 = 12,138.56/x
  3. Step 3: Cross multiply
    19,603.52x = 27,042.72 × 12,138.56
  4. Step 4: Simplify right side
    19,603.52x = 328,259,679.28
  5. Step 5: Solve for x
    x = 328,259,679.28/19,603.52
  6. Step 6: Final answer
    x = 16,744.94

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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.