Home / 21,010.41-28,995.71-11,579.85

Finding the Fourth Proportional to 21,010.41, 28,995.71 and 11,579.85

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Solution

The fourth proportional to 21,010.41, 28,995.71 and 11,579.85 is: 15,980.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.41 : 28,995.71 = 11,579.85 : x
  2. Step 2: Convert to fraction form
    21,010.41/28,995.71 = 11,579.85/x
  3. Step 3: Cross multiply
    21,010.41x = 28,995.71 × 11,579.85
  4. Step 4: Simplify right side
    21,010.41x = 335,765,914.54
  5. Step 5: Solve for x
    x = 335,765,914.54/21,010.41
  6. Step 6: Final answer
    x = 15,980.93

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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.