Home / 20,731.26-28,609.70-11,300.43

Finding the Fourth Proportional to 20,731.26, 28,609.70 and 11,300.43

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Solution

The fourth proportional to 20,731.26, 28,609.70 and 11,300.43 is: 15,594.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.26 : 28,609.70 = 11,300.43 : x
  2. Step 2: Convert to fraction form
    20,731.26/28,609.70 = 11,300.43/x
  3. Step 3: Cross multiply
    20,731.26x = 28,609.70 × 11,300.43
  4. Step 4: Simplify right side
    20,731.26x = 323,301,855.67
  5. Step 5: Solve for x
    x = 323,301,855.67/20,731.26
  6. Step 6: Final answer
    x = 15,594.90

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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.