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Finding the Fourth Proportional to 38,392.41, 52,985.82 and 21,398.20

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Solution

The fourth proportional to 38,392.41, 52,985.82 and 21,398.20 is: 29,531.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,392.41 : 52,985.82 = 21,398.20 : x
  2. Step 2: Convert to fraction form
    38,392.41/52,985.82 = 21,398.20/x
  3. Step 3: Cross multiply
    38,392.41x = 52,985.82 × 21,398.20
  4. Step 4: Simplify right side
    38,392.41x = 1,133,801,210.14
  5. Step 5: Solve for x
    x = 1,133,801,210.14/38,392.41
  6. Step 6: Final answer
    x = 29,531.91

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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.