Home / 20,187.30-30,285.74-6,861.18

Finding the Fourth Proportional to 20,187.30, 30,285.74 and 6,861.18

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Solution

The fourth proportional to 20,187.30, 30,285.74 and 6,861.18 is: 10,293.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.30 : 30,285.74 = 6,861.18 : x
  2. Step 2: Convert to fraction form
    20,187.30/30,285.74 = 6,861.18/x
  3. Step 3: Cross multiply
    20,187.30x = 30,285.74 × 6,861.18
  4. Step 4: Simplify right side
    20,187.30x = 207,795,913.57
  5. Step 5: Solve for x
    x = 207,795,913.57/20,187.30
  6. Step 6: Final answer
    x = 10,293.40

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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.