Home / 12,021.72-16,590-6,716.72

Finding the Fourth Proportional to 12,021.72, 16,590 and 6,716.72

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Solution

The fourth proportional to 12,021.72, 16,590 and 6,716.72 is: 9,269.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.72 : 16,590 = 6,716.72 : x
  2. Step 2: Convert to fraction form
    12,021.72/16,590 = 6,716.72/x
  3. Step 3: Cross multiply
    12,021.72x = 16,590 × 6,716.72
  4. Step 4: Simplify right side
    12,021.72x = 111,430,384.80
  5. Step 5: Solve for x
    x = 111,430,384.80/12,021.72
  6. Step 6: Final answer
    x = 9,269.09

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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.