Home / 20,891.93-31,186.16-19,350.09

Finding the Fourth Proportional to 20,891.93, 31,186.16 and 19,350.09

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Solution

The fourth proportional to 20,891.93, 31,186.16 and 19,350.09 is: 28,884.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.93 : 31,186.16 = 19,350.09 : x
  2. Step 2: Convert to fraction form
    20,891.93/31,186.16 = 19,350.09/x
  3. Step 3: Cross multiply
    20,891.93x = 31,186.16 × 19,350.09
  4. Step 4: Simplify right side
    20,891.93x = 603,455,087.41
  5. Step 5: Solve for x
    x = 603,455,087.41/20,891.93
  6. Step 6: Final answer
    x = 28,884.61

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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.