Home / 20,121.63-30,155.10-7,634.94

Finding the Fourth Proportional to 20,121.63, 30,155.10 and 7,634.94

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Solution

The fourth proportional to 20,121.63, 30,155.10 and 7,634.94 is: 11,442.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.63 : 30,155.10 = 7,634.94 : x
  2. Step 2: Convert to fraction form
    20,121.63/30,155.10 = 7,634.94/x
  3. Step 3: Cross multiply
    20,121.63x = 30,155.10 × 7,634.94
  4. Step 4: Simplify right side
    20,121.63x = 230,232,379.19
  5. Step 5: Solve for x
    x = 230,232,379.19/20,121.63
  6. Step 6: Final answer
    x = 11,442.03

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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.