Home / 21,416.40-29,556.72-11,986.56

Finding the Fourth Proportional to 21,416.40, 29,556.72 and 11,986.56

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Solution

The fourth proportional to 21,416.40, 29,556.72 and 11,986.56 is: 16,542.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,416.40 : 29,556.72 = 11,986.56 : x
  2. Step 2: Convert to fraction form
    21,416.40/29,556.72 = 11,986.56/x
  3. Step 3: Cross multiply
    21,416.40x = 29,556.72 × 11,986.56
  4. Step 4: Simplify right side
    21,416.40x = 354,283,397.68
  5. Step 5: Solve for x
    x = 354,283,397.68/21,416.40
  6. Step 6: Final answer
    x = 16,542.62

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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.