Home / 21,220.46-29,286.05-11,789.63

Finding the Fourth Proportional to 21,220.46, 29,286.05 and 11,789.63

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Solution

The fourth proportional to 21,220.46, 29,286.05 and 11,789.63 is: 16,270.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.46 : 29,286.05 = 11,789.63 : x
  2. Step 2: Convert to fraction form
    21,220.46/29,286.05 = 11,789.63/x
  3. Step 3: Cross multiply
    21,220.46x = 29,286.05 × 11,789.63
  4. Step 4: Simplify right side
    21,220.46x = 345,271,488.28
  5. Step 5: Solve for x
    x = 345,271,488.28/21,220.46
  6. Step 6: Final answer
    x = 16,270.69

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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.