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Finding the Fourth Proportional to 21,969.66, 32,905.26 and 13,186.44

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Solution

The fourth proportional to 21,969.66, 32,905.26 and 13,186.44 is: 19,750.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.66 : 32,905.26 = 13,186.44 : x
  2. Step 2: Convert to fraction form
    21,969.66/32,905.26 = 13,186.44/x
  3. Step 3: Cross multiply
    21,969.66x = 32,905.26 × 13,186.44
  4. Step 4: Simplify right side
    21,969.66x = 433,903,236.67
  5. Step 5: Solve for x
    x = 433,903,236.67/21,969.66
  6. Step 6: Final answer
    x = 19,750.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.