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Finding the Fourth Proportional to 25,402.51, 38,066.86 and 18,021.39

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Solution

The fourth proportional to 25,402.51, 38,066.86 and 18,021.39 is: 27,005.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,402.51 : 38,066.86 = 18,021.39 : x
  2. Step 2: Convert to fraction form
    25,402.51/38,066.86 = 18,021.39/x
  3. Step 3: Cross multiply
    25,402.51x = 38,066.86 × 18,021.39
  4. Step 4: Simplify right side
    25,402.51x = 686,017,609.91
  5. Step 5: Solve for x
    x = 686,017,609.91/25,402.51
  6. Step 6: Final answer
    x = 27,005.90

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.