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Finding the Fourth Proportional to 18,630.60, 25,697.21 and 12,651.88

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Solution

The fourth proportional to 18,630.60, 25,697.21 and 12,651.88 is: 17,450.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.60 : 25,697.21 = 12,651.88 : x
  2. Step 2: Convert to fraction form
    18,630.60/25,697.21 = 12,651.88/x
  3. Step 3: Cross multiply
    18,630.60x = 25,697.21 × 12,651.88
  4. Step 4: Simplify right side
    18,630.60x = 325,117,954.00
  5. Step 5: Solve for x
    x = 325,117,954.00/18,630.60
  6. Step 6: Final answer
    x = 17,450.76

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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.