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Finding the Fourth Proportional to 18,610.88, 27,920.87 and 9,255.30

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Solution

The fourth proportional to 18,610.88, 27,920.87 and 9,255.30 is: 13,885.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,610.88 : 27,920.87 = 9,255.30 : x
  2. Step 2: Convert to fraction form
    18,610.88/27,920.87 = 9,255.30/x
  3. Step 3: Cross multiply
    18,610.88x = 27,920.87 × 9,255.30
  4. Step 4: Simplify right side
    18,610.88x = 258,415,981.83
  5. Step 5: Solve for x
    x = 258,415,981.83/18,610.88
  6. Step 6: Final answer
    x = 13,885.21

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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.