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Finding the Fourth Proportional to 21,692.40, 32,538.60 and 5,276.40

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Solution

The fourth proportional to 21,692.40, 32,538.60 and 5,276.40 is: 7,914.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,692.40 : 32,538.60 = 5,276.40 : x
  2. Step 2: Convert to fraction form
    21,692.40/32,538.60 = 5,276.40/x
  3. Step 3: Cross multiply
    21,692.40x = 32,538.60 × 5,276.40
  4. Step 4: Simplify right side
    21,692.40x = 171,686,669.04
  5. Step 5: Solve for x
    x = 171,686,669.04/21,692.40
  6. Step 6: Final answer
    x = 7,914.60

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