Home / 21,010.03-28,993.74-11,578.57

Finding the Fourth Proportional to 21,010.03, 28,993.74 and 11,578.57

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Solution

The fourth proportional to 21,010.03, 28,993.74 and 11,578.57 is: 15,978.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.03 : 28,993.74 = 11,578.57 : x
  2. Step 2: Convert to fraction form
    21,010.03/28,993.74 = 11,578.57/x
  3. Step 3: Cross multiply
    21,010.03x = 28,993.74 × 11,578.57
  4. Step 4: Simplify right side
    21,010.03x = 335,705,903.18
  5. Step 5: Solve for x
    x = 335,705,903.18/21,010.03
  6. Step 6: Final answer
    x = 15,978.37

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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.