Home / 20,410.89-28,164.86-11,459.37

Finding the Fourth Proportional to 20,410.89, 28,164.86 and 11,459.37

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Solution

The fourth proportional to 20,410.89, 28,164.86 and 11,459.37 is: 15,812.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,410.89 : 28,164.86 = 11,459.37 : x
  2. Step 2: Convert to fraction form
    20,410.89/28,164.86 = 11,459.37/x
  3. Step 3: Cross multiply
    20,410.89x = 28,164.86 × 11,459.37
  4. Step 4: Simplify right side
    20,410.89x = 322,751,494.44
  5. Step 5: Solve for x
    x = 322,751,494.44/20,410.89
  6. Step 6: Final answer
    x = 15,812.71

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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.