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Finding the Fourth Proportional to 18,699.84, 25,805.43 and 10,202.01

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Solution

The fourth proportional to 18,699.84, 25,805.43 and 10,202.01 is: 14,078.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.84 : 25,805.43 = 10,202.01 : x
  2. Step 2: Convert to fraction form
    18,699.84/25,805.43 = 10,202.01/x
  3. Step 3: Cross multiply
    18,699.84x = 25,805.43 × 10,202.01
  4. Step 4: Simplify right side
    18,699.84x = 263,267,254.91
  5. Step 5: Solve for x
    x = 263,267,254.91/18,699.84
  6. Step 6: Final answer
    x = 14,078.58

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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.