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Finding the Fourth Proportional to 16,991.56, 23,459.78 and 13,005.56

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Solution

The fourth proportional to 16,991.56, 23,459.78 and 13,005.56 is: 17,956.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,991.56 : 23,459.78 = 13,005.56 : x
  2. Step 2: Convert to fraction form
    16,991.56/23,459.78 = 13,005.56/x
  3. Step 3: Cross multiply
    16,991.56x = 23,459.78 × 13,005.56
  4. Step 4: Simplify right side
    16,991.56x = 305,107,576.38
  5. Step 5: Solve for x
    x = 305,107,576.38/16,991.56
  6. Step 6: Final answer
    x = 17,956.42

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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.