Home / 20,419.28-30,630.60-8,732.60

Finding the Fourth Proportional to 20,419.28, 30,630.60 and 8,732.60

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Solution

The fourth proportional to 20,419.28, 30,630.60 and 8,732.60 is: 13,099.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.28 : 30,630.60 = 8,732.60 : x
  2. Step 2: Convert to fraction form
    20,419.28/30,630.60 = 8,732.60/x
  3. Step 3: Cross multiply
    20,419.28x = 30,630.60 × 8,732.60
  4. Step 4: Simplify right side
    20,419.28x = 267,484,777.56
  5. Step 5: Solve for x
    x = 267,484,777.56/20,419.28
  6. Step 6: Final answer
    x = 13,099.62

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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.