Home / 21,010.69-28,993.44-11,579.32

Finding the Fourth Proportional to 21,010.69, 28,993.44 and 11,579.32

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Solution

The fourth proportional to 21,010.69, 28,993.44 and 11,579.32 is: 15,978.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.69 : 28,993.44 = 11,579.32 : x
  2. Step 2: Convert to fraction form
    21,010.69/28,993.44 = 11,579.32/x
  3. Step 3: Cross multiply
    21,010.69x = 28,993.44 × 11,579.32
  4. Step 4: Simplify right side
    21,010.69x = 335,724,319.66
  5. Step 5: Solve for x
    x = 335,724,319.66/21,010.69
  6. Step 6: Final answer
    x = 15,978.74

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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.