Home / 20,081.59-30,120.10-5,291.67

Finding the Fourth Proportional to 20,081.59, 30,120.10 and 5,291.67

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Solution

The fourth proportional to 20,081.59, 30,120.10 and 5,291.67 is: 7,936.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.59 : 30,120.10 = 5,291.67 : x
  2. Step 2: Convert to fraction form
    20,081.59/30,120.10 = 5,291.67/x
  3. Step 3: Cross multiply
    20,081.59x = 30,120.10 × 5,291.67
  4. Step 4: Simplify right side
    20,081.59x = 159,385,629.57
  5. Step 5: Solve for x
    x = 159,385,629.57/20,081.59
  6. Step 6: Final answer
    x = 7,936.90

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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.