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Finding the Fourth Proportional to 13,989.63, 20,993.30 and 12,676.06

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Solution

The fourth proportional to 13,989.63, 20,993.30 and 12,676.06 is: 19,022.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.63 : 20,993.30 = 12,676.06 : x
  2. Step 2: Convert to fraction form
    13,989.63/20,993.30 = 12,676.06/x
  3. Step 3: Cross multiply
    13,989.63x = 20,993.30 × 12,676.06
  4. Step 4: Simplify right side
    13,989.63x = 266,112,330.40
  5. Step 5: Solve for x
    x = 266,112,330.40/13,989.63
  6. Step 6: Final answer
    x = 19,022.11

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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.