Home / 20,815.04-31,229.76-12,057.60

Finding the Fourth Proportional to 20,815.04, 31,229.76 and 12,057.60

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Solution

The fourth proportional to 20,815.04, 31,229.76 and 12,057.60 is: 18,090.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.04 : 31,229.76 = 12,057.60 : x
  2. Step 2: Convert to fraction form
    20,815.04/31,229.76 = 12,057.60/x
  3. Step 3: Cross multiply
    20,815.04x = 31,229.76 × 12,057.60
  4. Step 4: Simplify right side
    20,815.04x = 376,555,954.18
  5. Step 5: Solve for x
    x = 376,555,954.18/20,815.04
  6. Step 6: Final answer
    x = 18,090.57

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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.