Home / 19,121.96-28,686.78-6,809.64

Finding the Fourth Proportional to 19,121.96, 28,686.78 and 6,809.64

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Solution

The fourth proportional to 19,121.96, 28,686.78 and 6,809.64 is: 10,215.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,121.96 : 28,686.78 = 6,809.64 : x
  2. Step 2: Convert to fraction form
    19,121.96/28,686.78 = 6,809.64/x
  3. Step 3: Cross multiply
    19,121.96x = 28,686.78 × 6,809.64
  4. Step 4: Simplify right side
    19,121.96x = 195,346,644.56
  5. Step 5: Solve for x
    x = 195,346,644.56/19,121.96
  6. Step 6: Final answer
    x = 10,215.83

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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.