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Finding the Fourth Proportional to 18,339.40, 25,315.50 and 12,053.80

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Solution

The fourth proportional to 18,339.40, 25,315.50 and 12,053.80 is: 16,638.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339.40 : 25,315.50 = 12,053.80 : x
  2. Step 2: Convert to fraction form
    18,339.40/25,315.50 = 12,053.80/x
  3. Step 3: Cross multiply
    18,339.40x = 25,315.50 × 12,053.80
  4. Step 4: Simplify right side
    18,339.40x = 305,147,973.90
  5. Step 5: Solve for x
    x = 305,147,973.90/18,339.40
  6. Step 6: Final answer
    x = 16,638.93

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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.