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Finding the Fourth Proportional to 20,603.58, 30,949.08 and 19,403.82

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Solution

The fourth proportional to 20,603.58, 30,949.08 and 19,403.82 is: 29,146.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.58 : 30,949.08 = 19,403.82 : x
  2. Step 2: Convert to fraction form
    20,603.58/30,949.08 = 19,403.82/x
  3. Step 3: Cross multiply
    20,603.58x = 30,949.08 × 19,403.82
  4. Step 4: Simplify right side
    20,603.58x = 600,530,377.49
  5. Step 5: Solve for x
    x = 600,530,377.49/20,603.58
  6. Step 6: Final answer
    x = 29,146.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.