Home / 21,911.56-30,237-13,427.80

Finding the Fourth Proportional to 21,911.56, 30,237 and 13,427.80

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Solution

The fourth proportional to 21,911.56, 30,237 and 13,427.80 is: 18,529.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.56 : 30,237 = 13,427.80 : x
  2. Step 2: Convert to fraction form
    21,911.56/30,237 = 13,427.80/x
  3. Step 3: Cross multiply
    21,911.56x = 30,237 × 13,427.80
  4. Step 4: Simplify right side
    21,911.56x = 406,016,388.60
  5. Step 5: Solve for x
    x = 406,016,388.60/21,911.56
  6. Step 6: Final answer
    x = 18,529.78

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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.