Home / 20,481.31-28,256.61-13,411.63

Finding the Fourth Proportional to 20,481.31, 28,256.61 and 13,411.63

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Solution

The fourth proportional to 20,481.31, 28,256.61 and 13,411.63 is: 18,503.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.31 : 28,256.61 = 13,411.63 : x
  2. Step 2: Convert to fraction form
    20,481.31/28,256.61 = 13,411.63/x
  3. Step 3: Cross multiply
    20,481.31x = 28,256.61 × 13,411.63
  4. Step 4: Simplify right side
    20,481.31x = 378,967,198.37
  5. Step 5: Solve for x
    x = 378,967,198.37/20,481.31
  6. Step 6: Final answer
    x = 18,503.07

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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.