Home / 20,889.88-28,828.64-11,459.04

Finding the Fourth Proportional to 20,889.88, 28,828.64 and 11,459.04

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Solution

The fourth proportional to 20,889.88, 28,828.64 and 11,459.04 is: 15,813.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.88 : 28,828.64 = 11,459.04 : x
  2. Step 2: Convert to fraction form
    20,889.88/28,828.64 = 11,459.04/x
  3. Step 3: Cross multiply
    20,889.88x = 28,828.64 × 11,459.04
  4. Step 4: Simplify right side
    20,889.88x = 330,348,538.91
  5. Step 5: Solve for x
    x = 330,348,538.91/20,889.88
  6. Step 6: Final answer
    x = 15,813.81

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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.