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Finding the Fourth Proportional to 18,422.91, 27,634.37 and 15,885.99

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Solution

The fourth proportional to 18,422.91, 27,634.37 and 15,885.99 is: 23,828.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422.91 : 27,634.37 = 15,885.99 : x
  2. Step 2: Convert to fraction form
    18,422.91/27,634.37 = 15,885.99/x
  3. Step 3: Cross multiply
    18,422.91x = 27,634.37 × 15,885.99
  4. Step 4: Simplify right side
    18,422.91x = 438,999,246.05
  5. Step 5: Solve for x
    x = 438,999,246.05/18,422.91
  6. Step 6: Final answer
    x = 23,828.99

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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.