Home / 21,010.14-28,993.80-11,578.50

Finding the Fourth Proportional to 21,010.14, 28,993.80 and 11,578.50

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Solution

The fourth proportional to 21,010.14, 28,993.80 and 11,578.50 is: 15,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.14 : 28,993.80 = 11,578.50 : x
  2. Step 2: Convert to fraction form
    21,010.14/28,993.80 = 11,578.50/x
  3. Step 3: Cross multiply
    21,010.14x = 28,993.80 × 11,578.50
  4. Step 4: Simplify right side
    21,010.14x = 335,704,713.30
  5. Step 5: Solve for x
    x = 335,704,713.30/21,010.14
  6. Step 6: Final answer
    x = 15,978.22

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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.