Home / 20,240.88-27,984.60-15,540.72

Finding the Fourth Proportional to 20,240.88, 27,984.60 and 15,540.72

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Solution

The fourth proportional to 20,240.88, 27,984.60 and 15,540.72 is: 21,486.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.88 : 27,984.60 = 15,540.72 : x
  2. Step 2: Convert to fraction form
    20,240.88/27,984.60 = 15,540.72/x
  3. Step 3: Cross multiply
    20,240.88x = 27,984.60 × 15,540.72
  4. Step 4: Simplify right side
    20,240.88x = 434,900,832.91
  5. Step 5: Solve for x
    x = 434,900,832.91/20,240.88
  6. Step 6: Final answer
    x = 21,486.26

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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.