Home / 15,511.91-21,405.26-8,795.99

Finding the Fourth Proportional to 15,511.91, 21,405.26 and 8,795.99

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Solution

The fourth proportional to 15,511.91, 21,405.26 and 8,795.99 is: 12,137.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.91 : 21,405.26 = 8,795.99 : x
  2. Step 2: Convert to fraction form
    15,511.91/21,405.26 = 8,795.99/x
  3. Step 3: Cross multiply
    15,511.91x = 21,405.26 × 8,795.99
  4. Step 4: Simplify right side
    15,511.91x = 188,280,528.41
  5. Step 5: Solve for x
    x = 188,280,528.41/15,511.91
  6. Step 6: Final answer
    x = 12,137.81

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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.