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Finding the Fourth Proportional to 13,612,989.60, 19,072,357.20 and 13,612,989.60

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Solution

The fourth proportional to 13,612,989.60, 19,072,357.20 and 13,612,989.60 is: 19,072,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612,989.60 : 19,072,357.20 = 13,612,989.60 : x
  2. Step 2: Convert to fraction form
    13,612,989.60/19,072,357.20 = 13,612,989.60/x
  3. Step 3: Cross multiply
    13,612,989.60x = 19,072,357.20 × 13,612,989.60
  4. Step 4: Simplify right side
    13,612,989.60x = 259,631,800,211,085.09
  5. Step 5: Solve for x
    x = 259,631,800,211,085.09/13,612,989.60
  6. Step 6: Final answer
    x = 19,072,357.20

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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.