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Finding the Fourth Proportional to 19,603.78, 27,051.25 and 11,104.20

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Solution

The fourth proportional to 19,603.78, 27,051.25 and 11,104.20 is: 15,322.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,603.78 : 27,051.25 = 11,104.20 : x
  2. Step 2: Convert to fraction form
    19,603.78/27,051.25 = 11,104.20/x
  3. Step 3: Cross multiply
    19,603.78x = 27,051.25 × 11,104.20
  4. Step 4: Simplify right side
    19,603.78x = 300,382,490.25
  5. Step 5: Solve for x
    x = 300,382,490.25/19,603.78
  6. Step 6: Final answer
    x = 15,322.68

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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.