Home / 20,445.89-28,215.15-11,493.29

Finding the Fourth Proportional to 20,445.89, 28,215.15 and 11,493.29

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Solution

The fourth proportional to 20,445.89, 28,215.15 and 11,493.29 is: 15,860.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.89 : 28,215.15 = 11,493.29 : x
  2. Step 2: Convert to fraction form
    20,445.89/28,215.15 = 11,493.29/x
  3. Step 3: Cross multiply
    20,445.89x = 28,215.15 × 11,493.29
  4. Step 4: Simplify right side
    20,445.89x = 324,284,760.27
  5. Step 5: Solve for x
    x = 324,284,760.27/20,445.89
  6. Step 6: Final answer
    x = 15,860.64

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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.