Home / 15,311.70-21,128.85-8,596.80

Finding the Fourth Proportional to 15,311.70, 21,128.85 and 8,596.80

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Solution

The fourth proportional to 15,311.70, 21,128.85 and 8,596.80 is: 11,862.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.70 : 21,128.85 = 8,596.80 : x
  2. Step 2: Convert to fraction form
    15,311.70/21,128.85 = 8,596.80/x
  3. Step 3: Cross multiply
    15,311.70x = 21,128.85 × 8,596.80
  4. Step 4: Simplify right side
    15,311.70x = 181,640,497.68
  5. Step 5: Solve for x
    x = 181,640,497.68/15,311.70
  6. Step 6: Final answer
    x = 11,862.86

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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.