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Finding the Fourth Proportional to 18,754.86, 25,858.18 and 12,028.62

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Solution

The fourth proportional to 18,754.86, 25,858.18 and 12,028.62 is: 16,584.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.86 : 25,858.18 = 12,028.62 : x
  2. Step 2: Convert to fraction form
    18,754.86/25,858.18 = 12,028.62/x
  3. Step 3: Cross multiply
    18,754.86x = 25,858.18 × 12,028.62
  4. Step 4: Simplify right side
    18,754.86x = 311,038,031.68
  5. Step 5: Solve for x
    x = 311,038,031.68/18,754.86
  6. Step 6: Final answer
    x = 16,584.40

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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.