Home / 20,355.34-28,090.22-11,402.92

Finding the Fourth Proportional to 20,355.34, 28,090.22 and 11,402.92

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Solution

The fourth proportional to 20,355.34, 28,090.22 and 11,402.92 is: 15,735.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.34 : 28,090.22 = 11,402.92 : x
  2. Step 2: Convert to fraction form
    20,355.34/28,090.22 = 11,402.92/x
  3. Step 3: Cross multiply
    20,355.34x = 28,090.22 × 11,402.92
  4. Step 4: Simplify right side
    20,355.34x = 320,310,531.44
  5. Step 5: Solve for x
    x = 320,310,531.44/20,355.34
  6. Step 6: Final answer
    x = 15,735.95

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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.