Home / 20,343.91-30,431.61-19,099.75

Finding the Fourth Proportional to 20,343.91, 30,431.61 and 19,099.75

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Solution

The fourth proportional to 20,343.91, 30,431.61 and 19,099.75 is: 28,570.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.91 : 30,431.61 = 19,099.75 : x
  2. Step 2: Convert to fraction form
    20,343.91/30,431.61 = 19,099.75/x
  3. Step 3: Cross multiply
    20,343.91x = 30,431.61 × 19,099.75
  4. Step 4: Simplify right side
    20,343.91x = 581,236,143.10
  5. Step 5: Solve for x
    x = 581,236,143.10/20,343.91
  6. Step 6: Final answer
    x = 28,570.52

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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.