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Finding the Fourth Proportional to 18,459, 25,464.55 and 12,082.78

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Solution

The fourth proportional to 18,459, 25,464.55 and 12,082.78 is: 16,668.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,459 : 25,464.55 = 12,082.78 : x
  2. Step 2: Convert to fraction form
    18,459/25,464.55 = 12,082.78/x
  3. Step 3: Cross multiply
    18,459x = 25,464.55 × 12,082.78
  4. Step 4: Simplify right side
    18,459x = 307,682,555.45
  5. Step 5: Solve for x
    x = 307,682,555.45/18,459
  6. Step 6: Final answer
    x = 16,668.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.