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Finding the Fourth Proportional to 15,047.84, 20,767.68 and 10,858.72

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Solution

The fourth proportional to 15,047.84, 20,767.68 and 10,858.72 is: 14,986.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,047.84 : 20,767.68 = 10,858.72 : x
  2. Step 2: Convert to fraction form
    15,047.84/20,767.68 = 10,858.72/x
  3. Step 3: Cross multiply
    15,047.84x = 20,767.68 × 10,858.72
  4. Step 4: Simplify right side
    15,047.84x = 225,510,422.17
  5. Step 5: Solve for x
    x = 225,510,422.17/15,047.84
  6. Step 6: Final answer
    x = 14,986.23

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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.