Home / 20,021.40-30,042.90-8,335.80

Finding the Fourth Proportional to 20,021.40, 30,042.90 and 8,335.80

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Solution

The fourth proportional to 20,021.40, 30,042.90 and 8,335.80 is: 12,508.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,021.40 : 30,042.90 = 8,335.80 : x
  2. Step 2: Convert to fraction form
    20,021.40/30,042.90 = 8,335.80/x
  3. Step 3: Cross multiply
    20,021.40x = 30,042.90 × 8,335.80
  4. Step 4: Simplify right side
    20,021.40x = 250,431,605.82
  5. Step 5: Solve for x
    x = 250,431,605.82/20,021.40
  6. Step 6: Final answer
    x = 12,508.20

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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.