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Finding the Fourth Proportional to 28,512, 39,363.84 and 18,593.28

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Solution

The fourth proportional to 28,512, 39,363.84 and 18,593.28 is: 25,670.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512 : 39,363.84 = 18,593.28 : x
  2. Step 2: Convert to fraction form
    28,512/39,363.84 = 18,593.28/x
  3. Step 3: Cross multiply
    28,512x = 39,363.84 × 18,593.28
  4. Step 4: Simplify right side
    28,512x = 731,902,899.00
  5. Step 5: Solve for x
    x = 731,902,899.00/28,512
  6. Step 6: Final answer
    x = 25,670.00

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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.