Home / 21,456.28-29,609.22-11,765.60

Finding the Fourth Proportional to 21,456.28, 29,609.22 and 11,765.60

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Solution

The fourth proportional to 21,456.28, 29,609.22 and 11,765.60 is: 16,236.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.28 : 29,609.22 = 11,765.60 : x
  2. Step 2: Convert to fraction form
    21,456.28/29,609.22 = 11,765.60/x
  3. Step 3: Cross multiply
    21,456.28x = 29,609.22 × 11,765.60
  4. Step 4: Simplify right side
    21,456.28x = 348,370,238.83
  5. Step 5: Solve for x
    x = 348,370,238.83/21,456.28
  6. Step 6: Final answer
    x = 16,236.28

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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.