Home / 20,107.32-30,150-8,411.76

Finding the Fourth Proportional to 20,107.32, 30,150 and 8,411.76

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Solution

The fourth proportional to 20,107.32, 30,150 and 8,411.76 is: 12,613.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.32 : 30,150 = 8,411.76 : x
  2. Step 2: Convert to fraction form
    20,107.32/30,150 = 8,411.76/x
  3. Step 3: Cross multiply
    20,107.32x = 30,150 × 8,411.76
  4. Step 4: Simplify right side
    20,107.32x = 253,614,564
  5. Step 5: Solve for x
    x = 253,614,564/20,107.32
  6. Step 6: Final answer
    x = 12,613.05

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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.