Home / 20,540.89-28,346.41-11,109.43

Finding the Fourth Proportional to 20,540.89, 28,346.41 and 11,109.43

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Solution

The fourth proportional to 20,540.89, 28,346.41 and 11,109.43 is: 15,331.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.89 : 28,346.41 = 11,109.43 : x
  2. Step 2: Convert to fraction form
    20,540.89/28,346.41 = 11,109.43/x
  3. Step 3: Cross multiply
    20,540.89x = 28,346.41 × 11,109.43
  4. Step 4: Simplify right side
    20,540.89x = 314,912,457.65
  5. Step 5: Solve for x
    x = 314,912,457.65/20,540.89
  6. Step 6: Final answer
    x = 15,331.00

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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.