Home / 20,457.94-28,231.32-11,505.82

Finding the Fourth Proportional to 20,457.94, 28,231.32 and 11,505.82

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Solution

The fourth proportional to 20,457.94, 28,231.32 and 11,505.82 is: 15,877.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,457.94 : 28,231.32 = 11,505.82 : x
  2. Step 2: Convert to fraction form
    20,457.94/28,231.32 = 11,505.82/x
  3. Step 3: Cross multiply
    20,457.94x = 28,231.32 × 11,505.82
  4. Step 4: Simplify right side
    20,457.94x = 324,824,486.28
  5. Step 5: Solve for x
    x = 324,824,486.28/20,457.94
  6. Step 6: Final answer
    x = 15,877.67

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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.