Home / 20,419.18-28,179.16-11,467.46

Finding the Fourth Proportional to 20,419.18, 28,179.16 and 11,467.46

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Solution

The fourth proportional to 20,419.18, 28,179.16 and 11,467.46 is: 15,825.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.18 : 28,179.16 = 11,467.46 : x
  2. Step 2: Convert to fraction form
    20,419.18/28,179.16 = 11,467.46/x
  3. Step 3: Cross multiply
    20,419.18x = 28,179.16 × 11,467.46
  4. Step 4: Simplify right side
    20,419.18x = 323,143,390.13
  5. Step 5: Solve for x
    x = 323,143,390.13/20,419.18
  6. Step 6: Final answer
    x = 15,825.48

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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.