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Finding the Fourth Proportional to 38,893.53, 53,668.65 and 21,896.49

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Solution

The fourth proportional to 38,893.53, 53,668.65 and 21,896.49 is: 30,214.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,893.53 : 53,668.65 = 21,896.49 : x
  2. Step 2: Convert to fraction form
    38,893.53/53,668.65 = 21,896.49/x
  3. Step 3: Cross multiply
    38,893.53x = 53,668.65 × 21,896.49
  4. Step 4: Simplify right side
    38,893.53x = 1,175,155,058.04
  5. Step 5: Solve for x
    x = 1,175,155,058.04/38,893.53
  6. Step 6: Final answer
    x = 30,214.67

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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.