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Finding the Fourth Proportional to 12,999.89, 17,940 and 7,334.91

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Solution

The fourth proportional to 12,999.89, 17,940 and 7,334.91 is: 10,122.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.89 : 17,940 = 7,334.91 : x
  2. Step 2: Convert to fraction form
    12,999.89/17,940 = 7,334.91/x
  3. Step 3: Cross multiply
    12,999.89x = 17,940 × 7,334.91
  4. Step 4: Simplify right side
    12,999.89x = 131,588,285.40
  5. Step 5: Solve for x
    x = 131,588,285.40/12,999.89
  6. Step 6: Final answer
    x = 10,122.27

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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.