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Finding the Fourth Proportional to 38,893.71, 53,672.70 and 21,897.91

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Solution

The fourth proportional to 38,893.71, 53,672.70 and 21,897.91 is: 30,218.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,893.71 : 53,672.70 = 21,897.91 : x
  2. Step 2: Convert to fraction form
    38,893.71/53,672.70 = 21,897.91/x
  3. Step 3: Cross multiply
    38,893.71x = 53,672.70 × 21,897.91
  4. Step 4: Simplify right side
    38,893.71x = 1,175,319,954.06
  5. Step 5: Solve for x
    x = 1,175,319,954.06/38,893.71
  6. Step 6: Final answer
    x = 30,218.77

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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.