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Finding the Fourth Proportional to 18,043.70, 27,029.10 and 12,503.30

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Solution

The fourth proportional to 18,043.70, 27,029.10 and 12,503.30 is: 18,729.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,043.70 : 27,029.10 = 12,503.30 : x
  2. Step 2: Convert to fraction form
    18,043.70/27,029.10 = 12,503.30/x
  3. Step 3: Cross multiply
    18,043.70x = 27,029.10 × 12,503.30
  4. Step 4: Simplify right side
    18,043.70x = 337,952,946.03
  5. Step 5: Solve for x
    x = 337,952,946.03/18,043.70
  6. Step 6: Final answer
    x = 18,729.69

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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.