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Finding the Fourth Proportional to 18,561.84, 27,847.12 and 5,415.60

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Solution

The fourth proportional to 18,561.84, 27,847.12 and 5,415.60 is: 8,124.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.84 : 27,847.12 = 5,415.60 : x
  2. Step 2: Convert to fraction form
    18,561.84/27,847.12 = 5,415.60/x
  3. Step 3: Cross multiply
    18,561.84x = 27,847.12 × 5,415.60
  4. Step 4: Simplify right side
    18,561.84x = 150,808,863.07
  5. Step 5: Solve for x
    x = 150,808,863.07/18,561.84
  6. Step 6: Final answer
    x = 8,124.67

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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.