Home / 20,086.92-30,130.38-8,391.60

Finding the Fourth Proportional to 20,086.92, 30,130.38 and 8,391.60

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Solution

The fourth proportional to 20,086.92, 30,130.38 and 8,391.60 is: 12,587.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,086.92 : 30,130.38 = 8,391.60 : x
  2. Step 2: Convert to fraction form
    20,086.92/30,130.38 = 8,391.60/x
  3. Step 3: Cross multiply
    20,086.92x = 30,130.38 × 8,391.60
  4. Step 4: Simplify right side
    20,086.92x = 252,842,096.81
  5. Step 5: Solve for x
    x = 252,842,096.81/20,086.92
  6. Step 6: Final answer
    x = 12,587.40

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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.