Home / 20,124.10-30,164.55-7,639.30

Finding the Fourth Proportional to 20,124.10, 30,164.55 and 7,639.30

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Solution

The fourth proportional to 20,124.10, 30,164.55 and 7,639.30 is: 11,450.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,124.10 : 30,164.55 = 7,639.30 : x
  2. Step 2: Convert to fraction form
    20,124.10/30,164.55 = 7,639.30/x
  3. Step 3: Cross multiply
    20,124.10x = 30,164.55 × 7,639.30
  4. Step 4: Simplify right side
    20,124.10x = 230,436,046.82
  5. Step 5: Solve for x
    x = 230,436,046.82/20,124.10
  6. Step 6: Final answer
    x = 11,450.75

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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.