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Finding the Fourth Proportional to 18,245.40, 27,303.30 and 12,672.60

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Solution

The fourth proportional to 18,245.40, 27,303.30 and 12,672.60 is: 18,963.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,245.40 : 27,303.30 = 12,672.60 : x
  2. Step 2: Convert to fraction form
    18,245.40/27,303.30 = 12,672.60/x
  3. Step 3: Cross multiply
    18,245.40x = 27,303.30 × 12,672.60
  4. Step 4: Simplify right side
    18,245.40x = 346,003,799.58
  5. Step 5: Solve for x
    x = 346,003,799.58/18,245.40
  6. Step 6: Final answer
    x = 18,963.89

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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.