Home / 20,431.90-30,639.92-7,950.26

Finding the Fourth Proportional to 20,431.90, 30,639.92 and 7,950.26

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Solution

The fourth proportional to 20,431.90, 30,639.92 and 7,950.26 is: 11,922.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.90 : 30,639.92 = 7,950.26 : x
  2. Step 2: Convert to fraction form
    20,431.90/30,639.92 = 7,950.26/x
  3. Step 3: Cross multiply
    20,431.90x = 30,639.92 × 7,950.26
  4. Step 4: Simplify right side
    20,431.90x = 243,595,330.38
  5. Step 5: Solve for x
    x = 243,595,330.38/20,431.90
  6. Step 6: Final answer
    x = 11,922.30

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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.