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Finding the Fourth Proportional to 20,565.39, 30,701.99 and 19,836.39

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Solution

The fourth proportional to 20,565.39, 30,701.99 and 19,836.39 is: 29,613.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.39 : 30,701.99 = 19,836.39 : x
  2. Step 2: Convert to fraction form
    20,565.39/30,701.99 = 19,836.39/x
  3. Step 3: Cross multiply
    20,565.39x = 30,701.99 × 19,836.39
  4. Step 4: Simplify right side
    20,565.39x = 609,016,548.23
  5. Step 5: Solve for x
    x = 609,016,548.23/20,565.39
  6. Step 6: Final answer
    x = 29,613.66

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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.