Home / 20,419.90-28,180.09-11,467.59

Finding the Fourth Proportional to 20,419.90, 28,180.09 and 11,467.59

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Solution

The fourth proportional to 20,419.90, 28,180.09 and 11,467.59 is: 15,825.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.90 : 28,180.09 = 11,467.59 : x
  2. Step 2: Convert to fraction form
    20,419.90/28,180.09 = 11,467.59/x
  3. Step 3: Cross multiply
    20,419.90x = 28,180.09 × 11,467.59
  4. Step 4: Simplify right side
    20,419.90x = 323,157,661.51
  5. Step 5: Solve for x
    x = 323,157,661.51/20,419.90
  6. Step 6: Final answer
    x = 15,825.63

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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.