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Finding the Fourth Proportional to 13,910.99, 20,873.16 and 8,644.59

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Solution

The fourth proportional to 13,910.99, 20,873.16 and 8,644.59 is: 12,971.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,910.99 : 20,873.16 = 8,644.59 : x
  2. Step 2: Convert to fraction form
    13,910.99/20,873.16 = 8,644.59/x
  3. Step 3: Cross multiply
    13,910.99x = 20,873.16 × 8,644.59
  4. Step 4: Simplify right side
    13,910.99x = 180,439,910.20
  5. Step 5: Solve for x
    x = 180,439,910.20/13,910.99
  6. Step 6: Final answer
    x = 12,971.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.