Home / 28,103.13-38,716.45-19,589.78

Finding the Fourth Proportional to 28,103.13, 38,716.45 and 19,589.78

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Solution

The fourth proportional to 28,103.13, 38,716.45 and 19,589.78 is: 26,987.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,103.13 : 38,716.45 = 19,589.78 : x
  2. Step 2: Convert to fraction form
    28,103.13/38,716.45 = 19,589.78/x
  3. Step 3: Cross multiply
    28,103.13x = 38,716.45 × 19,589.78
  4. Step 4: Simplify right side
    28,103.13x = 758,446,737.88
  5. Step 5: Solve for x
    x = 758,446,737.88/28,103.13
  6. Step 6: Final answer
    x = 26,987.98

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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.