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Finding the Fourth Proportional to 18,276.40, 27,371.40 and 12,401.20

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Solution

The fourth proportional to 18,276.40, 27,371.40 and 12,401.20 is: 18,572.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,276.40 : 27,371.40 = 12,401.20 : x
  2. Step 2: Convert to fraction form
    18,276.40/27,371.40 = 12,401.20/x
  3. Step 3: Cross multiply
    18,276.40x = 27,371.40 × 12,401.20
  4. Step 4: Simplify right side
    18,276.40x = 339,438,205.68
  5. Step 5: Solve for x
    x = 339,438,205.68/18,276.40
  6. Step 6: Final answer
    x = 18,572.49

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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.