Home / 20,419.92-28,179.36-11,467.56

Finding the Fourth Proportional to 20,419.92, 28,179.36 and 11,467.56

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Solution

The fourth proportional to 20,419.92, 28,179.36 and 11,467.56 is: 15,825.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.92 : 28,179.36 = 11,467.56 : x
  2. Step 2: Convert to fraction form
    20,419.92/28,179.36 = 11,467.56/x
  3. Step 3: Cross multiply
    20,419.92x = 28,179.36 × 11,467.56
  4. Step 4: Simplify right side
    20,419.92x = 323,148,501.56
  5. Step 5: Solve for x
    x = 323,148,501.56/20,419.92
  6. Step 6: Final answer
    x = 15,825.16

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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.