Home / 20,837.05-28,755.86-11,405.62

Finding the Fourth Proportional to 20,837.05, 28,755.86 and 11,405.62

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Solution

The fourth proportional to 20,837.05, 28,755.86 and 11,405.62 is: 15,740.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.05 : 28,755.86 = 11,405.62 : x
  2. Step 2: Convert to fraction form
    20,837.05/28,755.86 = 11,405.62/x
  3. Step 3: Cross multiply
    20,837.05x = 28,755.86 × 11,405.62
  4. Step 4: Simplify right side
    20,837.05x = 327,978,411.93
  5. Step 5: Solve for x
    x = 327,978,411.93/20,837.05
  6. Step 6: Final answer
    x = 15,740.16

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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.