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Finding the Fourth Proportional to 28,384.90, 39,186.90 and 17,057.18

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Solution

The fourth proportional to 28,384.90, 39,186.90 and 17,057.18 is: 23,548.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.90 : 39,186.90 = 17,057.18 : x
  2. Step 2: Convert to fraction form
    28,384.90/39,186.90 = 17,057.18/x
  3. Step 3: Cross multiply
    28,384.90x = 39,186.90 × 17,057.18
  4. Step 4: Simplify right side
    28,384.90x = 668,418,006.94
  5. Step 5: Solve for x
    x = 668,418,006.94/28,384.90
  6. Step 6: Final answer
    x = 23,548.37

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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.