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Finding the Fourth Proportional to 18,625.50, 25,709.22 and 11,929.17

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Solution

The fourth proportional to 18,625.50, 25,709.22 and 11,929.17 is: 16,466.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,625.50 : 25,709.22 = 11,929.17 : x
  2. Step 2: Convert to fraction form
    18,625.50/25,709.22 = 11,929.17/x
  3. Step 3: Cross multiply
    18,625.50x = 25,709.22 × 11,929.17
  4. Step 4: Simplify right side
    18,625.50x = 306,689,655.95
  5. Step 5: Solve for x
    x = 306,689,655.95/18,625.50
  6. Step 6: Final answer
    x = 16,466.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.