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Finding the Fourth Proportional to 38,556.36, 53,203.50 and 21,789.36

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Solution

The fourth proportional to 38,556.36, 53,203.50 and 21,789.36 is: 30,066.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,556.36 : 53,203.50 = 21,789.36 : x
  2. Step 2: Convert to fraction form
    38,556.36/53,203.50 = 21,789.36/x
  3. Step 3: Cross multiply
    38,556.36x = 53,203.50 × 21,789.36
  4. Step 4: Simplify right side
    38,556.36x = 1,159,270,214.76
  5. Step 5: Solve for x
    x = 1,159,270,214.76/38,556.36
  6. Step 6: Final answer
    x = 30,066.90

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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.