Home / 20,837.72-28,755.33-11,888.12

Finding the Fourth Proportional to 20,837.72, 28,755.33 and 11,888.12

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Solution

The fourth proportional to 20,837.72, 28,755.33 and 11,888.12 is: 16,405.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.72 : 28,755.33 = 11,888.12 : x
  2. Step 2: Convert to fraction form
    20,837.72/28,755.33 = 11,888.12/x
  3. Step 3: Cross multiply
    20,837.72x = 28,755.33 × 11,888.12
  4. Step 4: Simplify right side
    20,837.72x = 341,846,669.90
  5. Step 5: Solve for x
    x = 341,846,669.90/20,837.72
  6. Step 6: Final answer
    x = 16,405.19

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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.