Home / 21,171.28-29,215.92-11,739.64

Finding the Fourth Proportional to 21,171.28, 29,215.92 and 11,739.64

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Solution

The fourth proportional to 21,171.28, 29,215.92 and 11,739.64 is: 16,200.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.28 : 29,215.92 = 11,739.64 : x
  2. Step 2: Convert to fraction form
    21,171.28/29,215.92 = 11,739.64/x
  3. Step 3: Cross multiply
    21,171.28x = 29,215.92 × 11,739.64
  4. Step 4: Simplify right side
    21,171.28x = 342,984,383.07
  5. Step 5: Solve for x
    x = 342,984,383.07/21,171.28
  6. Step 6: Final answer
    x = 16,200.46

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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.