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Finding the Fourth Proportional to 18,381.40, 27,600.90 and 12,563.80

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Solution

The fourth proportional to 18,381.40, 27,600.90 and 12,563.80 is: 18,865.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.40 : 27,600.90 = 12,563.80 : x
  2. Step 2: Convert to fraction form
    18,381.40/27,600.90 = 12,563.80/x
  3. Step 3: Cross multiply
    18,381.40x = 27,600.90 × 12,563.80
  4. Step 4: Simplify right side
    18,381.40x = 346,772,187.42
  5. Step 5: Solve for x
    x = 346,772,187.42/18,381.40
  6. Step 6: Final answer
    x = 18,865.38

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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.