Home / 20,708.10-28,568.43-17,121.42

Finding the Fourth Proportional to 20,708.10, 28,568.43 and 17,121.42

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Solution

The fourth proportional to 20,708.10, 28,568.43 and 17,121.42 is: 23,620.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.10 : 28,568.43 = 17,121.42 : x
  2. Step 2: Convert to fraction form
    20,708.10/28,568.43 = 17,121.42/x
  3. Step 3: Cross multiply
    20,708.10x = 28,568.43 × 17,121.42
  4. Step 4: Simplify right side
    20,708.10x = 489,132,088.77
  5. Step 5: Solve for x
    x = 489,132,088.77/20,708.10
  6. Step 6: Final answer
    x = 23,620.33

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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.