Home / 21,009.03-28,992.36-11,577.57

Finding the Fourth Proportional to 21,009.03, 28,992.36 and 11,577.57

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Solution

The fourth proportional to 21,009.03, 28,992.36 and 11,577.57 is: 15,976.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.03 : 28,992.36 = 11,577.57 : x
  2. Step 2: Convert to fraction form
    21,009.03/28,992.36 = 11,577.57/x
  3. Step 3: Cross multiply
    21,009.03x = 28,992.36 × 11,577.57
  4. Step 4: Simplify right side
    21,009.03x = 335,661,077.37
  5. Step 5: Solve for x
    x = 335,661,077.37/21,009.03
  6. Step 6: Final answer
    x = 15,976.99

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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.