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Finding the Fourth Proportional to 28,966.98, 39,992.49 and 19,907.94

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Solution

The fourth proportional to 28,966.98, 39,992.49 and 19,907.94 is: 27,485.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,966.98 : 39,992.49 = 19,907.94 : x
  2. Step 2: Convert to fraction form
    28,966.98/39,992.49 = 19,907.94/x
  3. Step 3: Cross multiply
    28,966.98x = 39,992.49 × 19,907.94
  4. Step 4: Simplify right side
    28,966.98x = 796,168,091.37
  5. Step 5: Solve for x
    x = 796,168,091.37/28,966.98
  6. Step 6: Final answer
    x = 27,485.37

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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.