Home / 20,427.90-30,638.19-5,435.11

Finding the Fourth Proportional to 20,427.90, 30,638.19 and 5,435.11

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Solution

The fourth proportional to 20,427.90, 30,638.19 and 5,435.11 is: 8,151.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.90 : 30,638.19 = 5,435.11 : x
  2. Step 2: Convert to fraction form
    20,427.90/30,638.19 = 5,435.11/x
  3. Step 3: Cross multiply
    20,427.90x = 30,638.19 × 5,435.11
  4. Step 4: Simplify right side
    20,427.90x = 166,521,932.85
  5. Step 5: Solve for x
    x = 166,521,932.85/20,427.90
  6. Step 6: Final answer
    x = 8,151.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.