Home / 20,915.16-28,675.79-20,540.94

Finding the Fourth Proportional to 20,915.16, 28,675.79 and 20,540.94

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Solution

The fourth proportional to 20,915.16, 28,675.79 and 20,540.94 is: 28,162.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.16 : 28,675.79 = 20,540.94 : x
  2. Step 2: Convert to fraction form
    20,915.16/28,675.79 = 20,540.94/x
  3. Step 3: Cross multiply
    20,915.16x = 28,675.79 × 20,540.94
  4. Step 4: Simplify right side
    20,915.16x = 589,027,579.14
  5. Step 5: Solve for x
    x = 589,027,579.14/20,915.16
  6. Step 6: Final answer
    x = 28,162.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.