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Finding the Fourth Proportional to 39,603.87, 54,653.54 and 21,698.82

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Solution

The fourth proportional to 39,603.87, 54,653.54 and 21,698.82 is: 29,944.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,603.87 : 54,653.54 = 21,698.82 : x
  2. Step 2: Convert to fraction form
    39,603.87/54,653.54 = 21,698.82/x
  3. Step 3: Cross multiply
    39,603.87x = 54,653.54 × 21,698.82
  4. Step 4: Simplify right side
    39,603.87x = 1,185,917,218.33
  5. Step 5: Solve for x
    x = 1,185,917,218.33/39,603.87
  6. Step 6: Final answer
    x = 29,944.48

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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.