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Finding the Fourth Proportional to 12,901.89, 17,806.41 and 9,328.44

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Solution

The fourth proportional to 12,901.89, 17,806.41 and 9,328.44 is: 12,874.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,901.89 : 17,806.41 = 9,328.44 : x
  2. Step 2: Convert to fraction form
    12,901.89/17,806.41 = 9,328.44/x
  3. Step 3: Cross multiply
    12,901.89x = 17,806.41 × 9,328.44
  4. Step 4: Simplify right side
    12,901.89x = 166,106,027.30
  5. Step 5: Solve for x
    x = 166,106,027.30/12,901.89
  6. Step 6: Final answer
    x = 12,874.55

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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.