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Finding the Fourth Proportional to 21,896.59, 30,205.83 and 13,827.32

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Solution

The fourth proportional to 21,896.59, 30,205.83 and 13,827.32 is: 19,074.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,896.59 : 30,205.83 = 13,827.32 : x
  2. Step 2: Convert to fraction form
    21,896.59/30,205.83 = 13,827.32/x
  3. Step 3: Cross multiply
    21,896.59x = 30,205.83 × 13,827.32
  4. Step 4: Simplify right side
    21,896.59x = 417,665,677.28
  5. Step 5: Solve for x
    x = 417,665,677.28/21,896.59
  6. Step 6: Final answer
    x = 19,074.46

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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.