Home / 12,939.26-17,861.72-8,911.73

Finding the Fourth Proportional to 12,939.26, 17,861.72 and 8,911.73

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Solution

The fourth proportional to 12,939.26, 17,861.72 and 8,911.73 is: 12,302.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.26 : 17,861.72 = 8,911.73 : x
  2. Step 2: Convert to fraction form
    12,939.26/17,861.72 = 8,911.73/x
  3. Step 3: Cross multiply
    12,939.26x = 17,861.72 × 8,911.73
  4. Step 4: Simplify right side
    12,939.26x = 159,178,826.07
  5. Step 5: Solve for x
    x = 159,178,826.07/12,939.26
  6. Step 6: Final answer
    x = 12,302.01

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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.