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Finding the Fourth Proportional to 25,928.60, 38,892.90 and 20,744.60

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Solution

The fourth proportional to 25,928.60, 38,892.90 and 20,744.60 is: 31,116.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,928.60 : 38,892.90 = 20,744.60 : x
  2. Step 2: Convert to fraction form
    25,928.60/38,892.90 = 20,744.60/x
  3. Step 3: Cross multiply
    25,928.60x = 38,892.90 × 20,744.60
  4. Step 4: Simplify right side
    25,928.60x = 806,817,653.34
  5. Step 5: Solve for x
    x = 806,817,653.34/25,928.60
  6. Step 6: Final answer
    x = 31,116.90

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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.