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Finding the Fourth Proportional to 28,603.50, 42,855.21 and 19,843.98

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Solution

The fourth proportional to 28,603.50, 42,855.21 and 19,843.98 is: 29,731.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,603.50 : 42,855.21 = 19,843.98 : x
  2. Step 2: Convert to fraction form
    28,603.50/42,855.21 = 19,843.98/x
  3. Step 3: Cross multiply
    28,603.50x = 42,855.21 × 19,843.98
  4. Step 4: Simplify right side
    28,603.50x = 850,417,930.14
  5. Step 5: Solve for x
    x = 850,417,930.14/28,603.50
  6. Step 6: Final answer
    x = 29,731.25

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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.