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Finding the Fourth Proportional to 38,553.57, 53,203.91 and 21,786.57

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Solution

The fourth proportional to 38,553.57, 53,203.91 and 21,786.57 is: 30,065.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,553.57 : 53,203.91 = 21,786.57 : x
  2. Step 2: Convert to fraction form
    38,553.57/53,203.91 = 21,786.57/x
  3. Step 3: Cross multiply
    38,553.57x = 53,203.91 × 21,786.57
  4. Step 4: Simplify right side
    38,553.57x = 1,159,130,600.56
  5. Step 5: Solve for x
    x = 1,159,130,600.56/38,553.57
  6. Step 6: Final answer
    x = 30,065.45

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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.