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Finding the Fourth Proportional to 28,773.36, 39,715.92 and 16,839.36

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Solution

The fourth proportional to 28,773.36, 39,715.92 and 16,839.36 is: 23,243.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,773.36 : 39,715.92 = 16,839.36 : x
  2. Step 2: Convert to fraction form
    28,773.36/39,715.92 = 16,839.36/x
  3. Step 3: Cross multiply
    28,773.36x = 39,715.92 × 16,839.36
  4. Step 4: Simplify right side
    28,773.36x = 668,790,674.61
  5. Step 5: Solve for x
    x = 668,790,674.61/28,773.36
  6. Step 6: Final answer
    x = 23,243.40

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1.5x scale

Why These Related Problems?

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