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Finding the Fourth Proportional to 25,881.80, 38,822.70 and 25,687.40

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Solution

The fourth proportional to 25,881.80, 38,822.70 and 25,687.40 is: 38,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,881.80 : 38,822.70 = 25,687.40 : x
  2. Step 2: Convert to fraction form
    25,881.80/38,822.70 = 25,687.40/x
  3. Step 3: Cross multiply
    25,881.80x = 38,822.70 × 25,687.40
  4. Step 4: Simplify right side
    25,881.80x = 997,254,223.98
  5. Step 5: Solve for x
    x = 997,254,223.98/25,881.80
  6. Step 6: Final answer
    x = 38,531.10

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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.