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Finding the Fourth Proportional to 18,177.90, 25,085.07 and 11,890.14

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Solution

The fourth proportional to 18,177.90, 25,085.07 and 11,890.14 is: 16,408.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,177.90 : 25,085.07 = 11,890.14 : x
  2. Step 2: Convert to fraction form
    18,177.90/25,085.07 = 11,890.14/x
  3. Step 3: Cross multiply
    18,177.90x = 25,085.07 × 11,890.14
  4. Step 4: Simplify right side
    18,177.90x = 298,264,994.21
  5. Step 5: Solve for x
    x = 298,264,994.21/18,177.90
  6. Step 6: Final answer
    x = 16,408.11

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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.