Home / 21,390.36-29,514.06-11,958.60

Finding the Fourth Proportional to 21,390.36, 29,514.06 and 11,958.60

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Solution

The fourth proportional to 21,390.36, 29,514.06 and 11,958.60 is: 16,500.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.36 : 29,514.06 = 11,958.60 : x
  2. Step 2: Convert to fraction form
    21,390.36/29,514.06 = 11,958.60/x
  3. Step 3: Cross multiply
    21,390.36x = 29,514.06 × 11,958.60
  4. Step 4: Simplify right side
    21,390.36x = 352,946,837.92
  5. Step 5: Solve for x
    x = 352,946,837.92/21,390.36
  6. Step 6: Final answer
    x = 16,500.28

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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.