Home / 20,718.05-28,590.57-11,286.54

Finding the Fourth Proportional to 20,718.05, 28,590.57 and 11,286.54

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Solution

The fourth proportional to 20,718.05, 28,590.57 and 11,286.54 is: 15,575.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.05 : 28,590.57 = 11,286.54 : x
  2. Step 2: Convert to fraction form
    20,718.05/28,590.57 = 11,286.54/x
  3. Step 3: Cross multiply
    20,718.05x = 28,590.57 × 11,286.54
  4. Step 4: Simplify right side
    20,718.05x = 322,688,611.93
  5. Step 5: Solve for x
    x = 322,688,611.93/20,718.05
  6. Step 6: Final answer
    x = 15,575.24

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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.