Home / 20,540.88-28,346.40-11,109.45

Finding the Fourth Proportional to 20,540.88, 28,346.40 and 11,109.45

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Solution

The fourth proportional to 20,540.88, 28,346.40 and 11,109.45 is: 15,331.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.88 : 28,346.40 = 11,109.45 : x
  2. Step 2: Convert to fraction form
    20,540.88/28,346.40 = 11,109.45/x
  3. Step 3: Cross multiply
    20,540.88x = 28,346.40 × 11,109.45
  4. Step 4: Simplify right side
    20,540.88x = 314,912,913.48
  5. Step 5: Solve for x
    x = 314,912,913.48/20,540.88
  6. Step 6: Final answer
    x = 15,331.03

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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.