Home / 20,419.72-28,177.11-11,467.15

Finding the Fourth Proportional to 20,419.72, 28,177.11 and 11,467.15

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Solution

The fourth proportional to 20,419.72, 28,177.11 and 11,467.15 is: 15,823.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.72 : 28,177.11 = 11,467.15 : x
  2. Step 2: Convert to fraction form
    20,419.72/28,177.11 = 11,467.15/x
  3. Step 3: Cross multiply
    20,419.72x = 28,177.11 × 11,467.15
  4. Step 4: Simplify right side
    20,419.72x = 323,111,076.49
  5. Step 5: Solve for x
    x = 323,111,076.49/20,419.72
  6. Step 6: Final answer
    x = 15,823.48

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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.