Home / 20,142.11-30,216.41-8,458.67

Finding the Fourth Proportional to 20,142.11, 30,216.41 and 8,458.67

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Solution

The fourth proportional to 20,142.11, 30,216.41 and 8,458.67 is: 12,689.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.11 : 30,216.41 = 8,458.67 : x
  2. Step 2: Convert to fraction form
    20,142.11/30,216.41 = 8,458.67/x
  3. Step 3: Cross multiply
    20,142.11x = 30,216.41 × 8,458.67
  4. Step 4: Simplify right side
    20,142.11x = 255,590,640.77
  5. Step 5: Solve for x
    x = 255,590,640.77/20,142.11
  6. Step 6: Final answer
    x = 12,689.37

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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.