Home / 18,904.93-28,370.46-7,811.72

Finding the Fourth Proportional to 18,904.93, 28,370.46 and 7,811.72

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Solution

The fourth proportional to 18,904.93, 28,370.46 and 7,811.72 is: 11,722.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.93 : 28,370.46 = 7,811.72 : x
  2. Step 2: Convert to fraction form
    18,904.93/28,370.46 = 7,811.72/x
  3. Step 3: Cross multiply
    18,904.93x = 28,370.46 × 7,811.72
  4. Step 4: Simplify right side
    18,904.93x = 221,621,947.94
  5. Step 5: Solve for x
    x = 221,621,947.94/18,904.93
  6. Step 6: Final answer
    x = 11,722.97

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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.