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Finding the Fourth Proportional to 18,600.66, 25,675.65 and 12,315.06

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Solution

The fourth proportional to 18,600.66, 25,675.65 and 12,315.06 is: 16,999.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,600.66 : 25,675.65 = 12,315.06 : x
  2. Step 2: Convert to fraction form
    18,600.66/25,675.65 = 12,315.06/x
  3. Step 3: Cross multiply
    18,600.66x = 25,675.65 × 12,315.06
  4. Step 4: Simplify right side
    18,600.66x = 316,197,170.29
  5. Step 5: Solve for x
    x = 316,197,170.29/18,600.66
  6. Step 6: Final answer
    x = 16,999.24

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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.