Home / 28,306.08-39,021.21-19,781.73

Finding the Fourth Proportional to 28,306.08, 39,021.21 and 19,781.73

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Solution

The fourth proportional to 28,306.08, 39,021.21 and 19,781.73 is: 27,270.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,306.08 : 39,021.21 = 19,781.73 : x
  2. Step 2: Convert to fraction form
    28,306.08/39,021.21 = 19,781.73/x
  3. Step 3: Cross multiply
    28,306.08x = 39,021.21 × 19,781.73
  4. Step 4: Simplify right side
    28,306.08x = 771,907,040.49
  5. Step 5: Solve for x
    x = 771,907,040.49/28,306.08
  6. Step 6: Final answer
    x = 27,270.01

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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.