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Finding the Fourth Proportional to 20,602.75, 30,885.80 and 7,452.20

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Solution

The fourth proportional to 20,602.75, 30,885.80 and 7,452.20 is: 11,171.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.75 : 30,885.80 = 7,452.20 : x
  2. Step 2: Convert to fraction form
    20,602.75/30,885.80 = 7,452.20/x
  3. Step 3: Cross multiply
    20,602.75x = 30,885.80 × 7,452.20
  4. Step 4: Simplify right side
    20,602.75x = 230,167,158.76
  5. Step 5: Solve for x
    x = 230,167,158.76/20,602.75
  6. Step 6: Final answer
    x = 11,171.67

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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.