Home / 31,528.36-43,484.52-20,198.90

Finding the Fourth Proportional to 31,528.36, 43,484.52 and 20,198.90

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Solution

The fourth proportional to 31,528.36, 43,484.52 and 20,198.90 is: 27,858.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,528.36 : 43,484.52 = 20,198.90 : x
  2. Step 2: Convert to fraction form
    31,528.36/43,484.52 = 20,198.90/x
  3. Step 3: Cross multiply
    31,528.36x = 43,484.52 × 20,198.90
  4. Step 4: Simplify right side
    31,528.36x = 878,339,598.68
  5. Step 5: Solve for x
    x = 878,339,598.68/31,528.36
  6. Step 6: Final answer
    x = 27,858.72

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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.