Home / 11,821.71-16,312.66-6,515.50

Finding the Fourth Proportional to 11,821.71, 16,312.66 and 6,515.50

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Solution

The fourth proportional to 11,821.71, 16,312.66 and 6,515.50 is: 8,990.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,821.71 : 16,312.66 = 6,515.50 : x
  2. Step 2: Convert to fraction form
    11,821.71/16,312.66 = 6,515.50/x
  3. Step 3: Cross multiply
    11,821.71x = 16,312.66 × 6,515.50
  4. Step 4: Simplify right side
    11,821.71x = 106,285,136.23
  5. Step 5: Solve for x
    x = 106,285,136.23/11,821.71
  6. Step 6: Final answer
    x = 8,990.67

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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.