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Finding the Fourth Proportional to 20,804,571.90, 31,206,955.05 and 7,341,399.90

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Solution

The fourth proportional to 20,804,571.90, 31,206,955.05 and 7,341,399.90 is: 11,012,134.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804,571.90 : 31,206,955.05 = 7,341,399.90 : x
  2. Step 2: Convert to fraction form
    20,804,571.90/31,206,955.05 = 7,341,399.90/x
  3. Step 3: Cross multiply
    20,804,571.90x = 31,206,955.05 × 7,341,399.90
  4. Step 4: Simplify right side
    20,804,571.90x = 229,102,736,683,374.50
  5. Step 5: Solve for x
    x = 229,102,736,683,374.50/20,804,571.90
  6. Step 6: Final answer
    x = 11,012,134.15

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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.