Home / 21,840.37-30,136.03-12,279.00

Finding the Fourth Proportional to 21,840.37, 30,136.03 and 12,279.00

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Solution

The fourth proportional to 21,840.37, 30,136.03 and 12,279.00 is: 16,942.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,840.37 : 30,136.03 = 12,279.00 : x
  2. Step 2: Convert to fraction form
    21,840.37/30,136.03 = 12,279.00/x
  3. Step 3: Cross multiply
    21,840.37x = 30,136.03 × 12,279.00
  4. Step 4: Simplify right side
    21,840.37x = 370,040,168.66
  5. Step 5: Solve for x
    x = 370,040,168.66/21,840.37
  6. Step 6: Final answer
    x = 16,942.94

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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.