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Finding the Fourth Proportional to 28,102.41, 42,168.20 and 20,375.01

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Solution

The fourth proportional to 28,102.41, 42,168.20 and 20,375.01 is: 30,573.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.41 : 42,168.20 = 20,375.01 : x
  2. Step 2: Convert to fraction form
    28,102.41/42,168.20 = 20,375.01/x
  3. Step 3: Cross multiply
    28,102.41x = 42,168.20 × 20,375.01
  4. Step 4: Simplify right side
    28,102.41x = 859,177,394.81
  5. Step 5: Solve for x
    x = 859,177,394.81/28,102.41
  6. Step 6: Final answer
    x = 30,573.09

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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.