Home / 18,939.89-28,409.91-5,792.21

Finding the Fourth Proportional to 18,939.89, 28,409.91 and 5,792.21

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Solution

The fourth proportional to 18,939.89, 28,409.91 and 5,792.21 is: 8,688.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.89 : 28,409.91 = 5,792.21 : x
  2. Step 2: Convert to fraction form
    18,939.89/28,409.91 = 5,792.21/x
  3. Step 3: Cross multiply
    18,939.89x = 28,409.91 × 5,792.21
  4. Step 4: Simplify right side
    18,939.89x = 164,556,107.57
  5. Step 5: Solve for x
    x = 164,556,107.57/18,939.89
  6. Step 6: Final answer
    x = 8,688.33

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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.