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Finding the Fourth Proportional to 30,216.98, 45,340.97 and 12,461.28

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Solution

The fourth proportional to 30,216.98, 45,340.97 and 12,461.28 is: 18,698.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,216.98 : 45,340.97 = 12,461.28 : x
  2. Step 2: Convert to fraction form
    30,216.98/45,340.97 = 12,461.28/x
  3. Step 3: Cross multiply
    30,216.98x = 45,340.97 × 12,461.28
  4. Step 4: Simplify right side
    30,216.98x = 565,006,460.34
  5. Step 5: Solve for x
    x = 565,006,460.34/30,216.98
  6. Step 6: Final answer
    x = 18,698.31

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