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Finding the Fourth Proportional to 12,999.57, 17,939.52 and 8,283.75

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Solution

The fourth proportional to 12,999.57, 17,939.52 and 8,283.75 is: 11,431.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.57 : 17,939.52 = 8,283.75 : x
  2. Step 2: Convert to fraction form
    12,999.57/17,939.52 = 8,283.75/x
  3. Step 3: Cross multiply
    12,999.57x = 17,939.52 × 8,283.75
  4. Step 4: Simplify right side
    12,999.57x = 148,606,498.80
  5. Step 5: Solve for x
    x = 148,606,498.80/12,999.57
  6. Step 6: Final answer
    x = 11,431.65

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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.