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Finding the Fourth Proportional to 18,151,782.80, 25,431,391.60 and 18,151,782.80

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Solution

The fourth proportional to 18,151,782.80, 25,431,391.60 and 18,151,782.80 is: 25,431,391.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,151,782.80 : 25,431,391.60 = 18,151,782.80 : x
  2. Step 2: Convert to fraction form
    18,151,782.80/25,431,391.60 = 18,151,782.80/x
  3. Step 3: Cross multiply
    18,151,782.80x = 25,431,391.60 × 18,151,782.80
  4. Step 4: Simplify right side
    18,151,782.80x = 461,625,096,624,944.50
  5. Step 5: Solve for x
    x = 461,625,096,624,944.50/18,151,782.80
  6. Step 6: Final answer
    x = 25,431,391.60

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.