Home / 20,837.67-28,755.45-11,405.63

Finding the Fourth Proportional to 20,837.67, 28,755.45 and 11,405.63

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Solution

The fourth proportional to 20,837.67, 28,755.45 and 11,405.63 is: 15,739.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.67 : 28,755.45 = 11,405.63 : x
  2. Step 2: Convert to fraction form
    20,837.67/28,755.45 = 11,405.63/x
  3. Step 3: Cross multiply
    20,837.67x = 28,755.45 × 11,405.63
  4. Step 4: Simplify right side
    20,837.67x = 327,974,023.18
  5. Step 5: Solve for x
    x = 327,974,023.18/20,837.67
  6. Step 6: Final answer
    x = 15,739.48

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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.