Home / 15,890.82-21,929.82-8,817.80

Finding the Fourth Proportional to 15,890.82, 21,929.82 and 8,817.80

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Solution

The fourth proportional to 15,890.82, 21,929.82 and 8,817.80 is: 12,168.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.82 : 21,929.82 = 8,817.80 : x
  2. Step 2: Convert to fraction form
    15,890.82/21,929.82 = 8,817.80/x
  3. Step 3: Cross multiply
    15,890.82x = 21,929.82 × 8,817.80
  4. Step 4: Simplify right side
    15,890.82x = 193,372,766.80
  5. Step 5: Solve for x
    x = 193,372,766.80/15,890.82
  6. Step 6: Final answer
    x = 12,168.84

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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.