Home / 21,789.44-30,028.56-15,490.88

Finding the Fourth Proportional to 21,789.44, 30,028.56 and 15,490.88

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Solution

The fourth proportional to 21,789.44, 30,028.56 and 15,490.88 is: 21,348.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.44 : 30,028.56 = 15,490.88 : x
  2. Step 2: Convert to fraction form
    21,789.44/30,028.56 = 15,490.88/x
  3. Step 3: Cross multiply
    21,789.44x = 30,028.56 × 15,490.88
  4. Step 4: Simplify right side
    21,789.44x = 465,168,819.53
  5. Step 5: Solve for x
    x = 465,168,819.53/21,789.44
  6. Step 6: Final answer
    x = 21,348.36

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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.