Home / 28,106.24-38,820.29-20,540.43

Finding the Fourth Proportional to 28,106.24, 38,820.29 and 20,540.43

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Solution

The fourth proportional to 28,106.24, 38,820.29 and 20,540.43 is: 28,370.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,106.24 : 38,820.29 = 20,540.43 : x
  2. Step 2: Convert to fraction form
    28,106.24/38,820.29 = 20,540.43/x
  3. Step 3: Cross multiply
    28,106.24x = 38,820.29 × 20,540.43
  4. Step 4: Simplify right side
    28,106.24x = 797,385,346.62
  5. Step 5: Solve for x
    x = 797,385,346.62/28,106.24
  6. Step 6: Final answer
    x = 28,370.41

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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.