Home / 20,620.35-30,909.47-8,123.18

Finding the Fourth Proportional to 20,620.35, 30,909.47 and 8,123.18

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Solution

The fourth proportional to 20,620.35, 30,909.47 and 8,123.18 is: 12,176.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.35 : 30,909.47 = 8,123.18 : x
  2. Step 2: Convert to fraction form
    20,620.35/30,909.47 = 8,123.18/x
  3. Step 3: Cross multiply
    20,620.35x = 30,909.47 × 8,123.18
  4. Step 4: Simplify right side
    20,620.35x = 251,083,167.22
  5. Step 5: Solve for x
    x = 251,083,167.22/20,620.35
  6. Step 6: Final answer
    x = 12,176.47

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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.