Home / 21,918.36-30,247.20-12,486.84

Finding the Fourth Proportional to 21,918.36, 30,247.20 and 12,486.84

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Solution

The fourth proportional to 21,918.36, 30,247.20 and 12,486.84 is: 17,231.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.36 : 30,247.20 = 12,486.84 : x
  2. Step 2: Convert to fraction form
    21,918.36/30,247.20 = 12,486.84/x
  3. Step 3: Cross multiply
    21,918.36x = 30,247.20 × 12,486.84
  4. Step 4: Simplify right side
    21,918.36x = 377,691,946.85
  5. Step 5: Solve for x
    x = 377,691,946.85/21,918.36
  6. Step 6: Final answer
    x = 17,231.76

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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.