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Finding the Fourth Proportional to 13,988.44, 20,983.74 and 8,448.04

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Solution

The fourth proportional to 13,988.44, 20,983.74 and 8,448.04 is: 12,672.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.44 : 20,983.74 = 8,448.04 : x
  2. Step 2: Convert to fraction form
    13,988.44/20,983.74 = 8,448.04/x
  3. Step 3: Cross multiply
    13,988.44x = 20,983.74 × 8,448.04
  4. Step 4: Simplify right side
    13,988.44x = 177,271,474.87
  5. Step 5: Solve for x
    x = 177,271,474.87/13,988.44
  6. Step 6: Final answer
    x = 12,672.71

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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.