Home / 21,358.62-29,475.09-12,406.50

Finding the Fourth Proportional to 21,358.62, 29,475.09 and 12,406.50

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Solution

The fourth proportional to 21,358.62, 29,475.09 and 12,406.50 is: 17,121.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,358.62 : 29,475.09 = 12,406.50 : x
  2. Step 2: Convert to fraction form
    21,358.62/29,475.09 = 12,406.50/x
  3. Step 3: Cross multiply
    21,358.62x = 29,475.09 × 12,406.50
  4. Step 4: Simplify right side
    21,358.62x = 365,682,704.09
  5. Step 5: Solve for x
    x = 365,682,704.09/21,358.62
  6. Step 6: Final answer
    x = 17,121.08

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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.