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Finding the Fourth Proportional to 20,795.98, 28,695.14 and 11,843.65

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Solution

The fourth proportional to 20,795.98, 28,695.14 and 11,843.65 is: 16,342.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.98 : 28,695.14 = 11,843.65 : x
  2. Step 2: Convert to fraction form
    20,795.98/28,695.14 = 11,843.65/x
  3. Step 3: Cross multiply
    20,795.98x = 28,695.14 × 11,843.65
  4. Step 4: Simplify right side
    20,795.98x = 339,855,135.64
  5. Step 5: Solve for x
    x = 339,855,135.64/20,795.98
  6. Step 6: Final answer
    x = 16,342.35

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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.