Home / 19,185.09-28,781.55-8,091.77

Finding the Fourth Proportional to 19,185.09, 28,781.55 and 8,091.77

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Solution

The fourth proportional to 19,185.09, 28,781.55 and 8,091.77 is: 12,139.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,185.09 : 28,781.55 = 8,091.77 : x
  2. Step 2: Convert to fraction form
    19,185.09/28,781.55 = 8,091.77/x
  3. Step 3: Cross multiply
    19,185.09x = 28,781.55 × 8,091.77
  4. Step 4: Simplify right side
    19,185.09x = 232,893,538.94
  5. Step 5: Solve for x
    x = 232,893,538.94/19,185.09
  6. Step 6: Final answer
    x = 12,139.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.