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Finding the Fourth Proportional to 28,809.81, 39,773.23 and 19,905.26

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Solution

The fourth proportional to 28,809.81, 39,773.23 and 19,905.26 is: 27,480.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,809.81 : 39,773.23 = 19,905.26 : x
  2. Step 2: Convert to fraction form
    28,809.81/39,773.23 = 19,905.26/x
  3. Step 3: Cross multiply
    28,809.81x = 39,773.23 × 19,905.26
  4. Step 4: Simplify right side
    28,809.81x = 791,696,235.56
  5. Step 5: Solve for x
    x = 791,696,235.56/28,809.81
  6. Step 6: Final answer
    x = 27,480.09

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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.