Home / 20,208.15-30,315.89-8,355.48

Finding the Fourth Proportional to 20,208.15, 30,315.89 and 8,355.48

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Solution

The fourth proportional to 20,208.15, 30,315.89 and 8,355.48 is: 12,534.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,208.15 : 30,315.89 = 8,355.48 : x
  2. Step 2: Convert to fraction form
    20,208.15/30,315.89 = 8,355.48/x
  3. Step 3: Cross multiply
    20,208.15x = 30,315.89 × 8,355.48
  4. Step 4: Simplify right side
    20,208.15x = 253,303,770.80
  5. Step 5: Solve for x
    x = 253,303,770.80/20,208.15
  6. Step 6: Final answer
    x = 12,534.73

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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.