Home / 21,469.68-29,628.40-11,909.76

Finding the Fourth Proportional to 21,469.68, 29,628.40 and 11,909.76

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Solution

The fourth proportional to 21,469.68, 29,628.40 and 11,909.76 is: 16,435.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,469.68 : 29,628.40 = 11,909.76 : x
  2. Step 2: Convert to fraction form
    21,469.68/29,628.40 = 11,909.76/x
  3. Step 3: Cross multiply
    21,469.68x = 29,628.40 × 11,909.76
  4. Step 4: Simplify right side
    21,469.68x = 352,867,133.18
  5. Step 5: Solve for x
    x = 352,867,133.18/21,469.68
  6. Step 6: Final answer
    x = 16,435.60

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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.