Home / 20,900.92-31,351.86-5,106.08

Finding the Fourth Proportional to 20,900.92, 31,351.86 and 5,106.08

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Solution

The fourth proportional to 20,900.92, 31,351.86 and 5,106.08 is: 7,659.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.92 : 31,351.86 = 5,106.08 : x
  2. Step 2: Convert to fraction form
    20,900.92/31,351.86 = 5,106.08/x
  3. Step 3: Cross multiply
    20,900.92x = 31,351.86 × 5,106.08
  4. Step 4: Simplify right side
    20,900.92x = 160,085,183.69
  5. Step 5: Solve for x
    x = 160,085,183.69/20,900.92
  6. Step 6: Final answer
    x = 7,659.24

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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.