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Finding the Fourth Proportional to 18,904.68, 28,372.14 and 8,517.24

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Solution

The fourth proportional to 18,904.68, 28,372.14 and 8,517.24 is: 12,782.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.68 : 28,372.14 = 8,517.24 : x
  2. Step 2: Convert to fraction form
    18,904.68/28,372.14 = 8,517.24/x
  3. Step 3: Cross multiply
    18,904.68x = 28,372.14 × 8,517.24
  4. Step 4: Simplify right side
    18,904.68x = 241,652,325.69
  5. Step 5: Solve for x
    x = 241,652,325.69/18,904.68
  6. Step 6: Final answer
    x = 12,782.67

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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.