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Finding the Fourth Proportional to 22,459.16, 30,991.92 and 12,387.98

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Solution

The fourth proportional to 22,459.16, 30,991.92 and 12,387.98 is: 17,094.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,459.16 : 30,991.92 = 12,387.98 : x
  2. Step 2: Convert to fraction form
    22,459.16/30,991.92 = 12,387.98/x
  3. Step 3: Cross multiply
    22,459.16x = 30,991.92 × 12,387.98
  4. Step 4: Simplify right side
    22,459.16x = 383,927,285.12
  5. Step 5: Solve for x
    x = 383,927,285.12/22,459.16
  6. Step 6: Final answer
    x = 17,094.46

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.