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Finding the Fourth Proportional to 28,768, 39,699.84 and 19,941.12

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Solution

The fourth proportional to 28,768, 39,699.84 and 19,941.12 is: 27,518.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,768 : 39,699.84 = 19,941.12 : x
  2. Step 2: Convert to fraction form
    28,768/39,699.84 = 19,941.12/x
  3. Step 3: Cross multiply
    28,768x = 39,699.84 × 19,941.12
  4. Step 4: Simplify right side
    28,768x = 791,659,273.42
  5. Step 5: Solve for x
    x = 791,659,273.42/28,768
  6. Step 6: Final answer
    x = 27,518.75

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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.