Home / 21,009.93-28,993.53-11,578.48

Finding the Fourth Proportional to 21,009.93, 28,993.53 and 11,578.48

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Solution

The fourth proportional to 21,009.93, 28,993.53 and 11,578.48 is: 15,978.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.93 : 28,993.53 = 11,578.48 : x
  2. Step 2: Convert to fraction form
    21,009.93/28,993.53 = 11,578.48/x
  3. Step 3: Cross multiply
    21,009.93x = 28,993.53 × 11,578.48
  4. Step 4: Simplify right side
    21,009.93x = 335,701,007.23
  5. Step 5: Solve for x
    x = 335,701,007.23/21,009.93
  6. Step 6: Final answer
    x = 15,978.21

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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.