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Finding the Fourth Proportional to 18,968,783.92, 28,458,502.44 and 7,617,204.16

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Solution

The fourth proportional to 18,968,783.92, 28,458,502.44 and 7,617,204.16 is: 11,427,945.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968,783.92 : 28,458,502.44 = 7,617,204.16 : x
  2. Step 2: Convert to fraction form
    18,968,783.92/28,458,502.44 = 7,617,204.16/x
  3. Step 3: Cross multiply
    18,968,783.92x = 28,458,502.44 × 7,617,204.16
  4. Step 4: Simplify right side
    18,968,783.92x = 216,774,223,173,338.16
  5. Step 5: Solve for x
    x = 216,774,223,173,338.16/18,968,783.92
  6. Step 6: Final answer
    x = 11,427,945.20

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Why These Related Problems?

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