Home / 20,018.40-30,031.36-6,872.64

Finding the Fourth Proportional to 20,018.40, 30,031.36 and 6,872.64

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Solution

The fourth proportional to 20,018.40, 30,031.36 and 6,872.64 is: 10,310.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,018.40 : 30,031.36 = 6,872.64 : x
  2. Step 2: Convert to fraction form
    20,018.40/30,031.36 = 6,872.64/x
  3. Step 3: Cross multiply
    20,018.40x = 30,031.36 × 6,872.64
  4. Step 4: Simplify right side
    20,018.40x = 206,394,725.99
  5. Step 5: Solve for x
    x = 206,394,725.99/20,018.40
  6. Step 6: Final answer
    x = 10,310.25

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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.