Home / 20,168.60-30,260.10-8,485.40

Finding the Fourth Proportional to 20,168.60, 30,260.10 and 8,485.40

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Solution

The fourth proportional to 20,168.60, 30,260.10 and 8,485.40 is: 12,731.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.60 : 30,260.10 = 8,485.40 : x
  2. Step 2: Convert to fraction form
    20,168.60/30,260.10 = 8,485.40/x
  3. Step 3: Cross multiply
    20,168.60x = 30,260.10 × 8,485.40
  4. Step 4: Simplify right side
    20,168.60x = 256,769,052.54
  5. Step 5: Solve for x
    x = 256,769,052.54/20,168.60
  6. Step 6: Final answer
    x = 12,731.13

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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.