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Finding the Fourth Proportional to 20,672.69, 30,915.60 and 15,928.27

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Solution

The fourth proportional to 20,672.69, 30,915.60 and 15,928.27 is: 23,820.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.69 : 30,915.60 = 15,928.27 : x
  2. Step 2: Convert to fraction form
    20,672.69/30,915.60 = 15,928.27/x
  3. Step 3: Cross multiply
    20,672.69x = 30,915.60 × 15,928.27
  4. Step 4: Simplify right side
    20,672.69x = 492,432,018.74
  5. Step 5: Solve for x
    x = 492,432,018.74/20,672.69
  6. Step 6: Final answer
    x = 23,820.41

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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.