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Finding the Fourth Proportional to 19,969.40, 29,824.40 and 18,777.08

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Solution

The fourth proportional to 19,969.40, 29,824.40 and 18,777.08 is: 28,043.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,969.40 : 29,824.40 = 18,777.08 : x
  2. Step 2: Convert to fraction form
    19,969.40/29,824.40 = 18,777.08/x
  3. Step 3: Cross multiply
    19,969.40x = 29,824.40 × 18,777.08
  4. Step 4: Simplify right side
    19,969.40x = 560,015,144.75
  5. Step 5: Solve for x
    x = 560,015,144.75/19,969.40
  6. Step 6: Final answer
    x = 28,043.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.