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Finding the Fourth Proportional to 18,630.56, 25,720.80 and 12,351.44

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Solution

The fourth proportional to 18,630.56, 25,720.80 and 12,351.44 is: 17,052.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.56 : 25,720.80 = 12,351.44 : x
  2. Step 2: Convert to fraction form
    18,630.56/25,720.80 = 12,351.44/x
  3. Step 3: Cross multiply
    18,630.56x = 25,720.80 × 12,351.44
  4. Step 4: Simplify right side
    18,630.56x = 317,688,917.95
  5. Step 5: Solve for x
    x = 317,688,917.95/18,630.56
  6. Step 6: Final answer
    x = 17,052.03

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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.