Home / 20,606.55-30,928.96-8,135.18

Finding the Fourth Proportional to 20,606.55, 30,928.96 and 8,135.18

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Solution

The fourth proportional to 20,606.55, 30,928.96 and 8,135.18 is: 12,210.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,606.55 : 30,928.96 = 8,135.18 : x
  2. Step 2: Convert to fraction form
    20,606.55/30,928.96 = 8,135.18/x
  3. Step 3: Cross multiply
    20,606.55x = 30,928.96 × 8,135.18
  4. Step 4: Simplify right side
    20,606.55x = 251,612,825.18
  5. Step 5: Solve for x
    x = 251,612,825.18/20,606.55
  6. Step 6: Final answer
    x = 12,210.33

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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.