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Finding the Fourth Proportional to 20,285.70, 30,423.15 and 6,245.70

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Solution

The fourth proportional to 20,285.70, 30,423.15 and 6,245.70 is: 9,366.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,285.70 : 30,423.15 = 6,245.70 : x
  2. Step 2: Convert to fraction form
    20,285.70/30,423.15 = 6,245.70/x
  3. Step 3: Cross multiply
    20,285.70x = 30,423.15 × 6,245.70
  4. Step 4: Simplify right side
    20,285.70x = 190,013,867.96
  5. Step 5: Solve for x
    x = 190,013,867.96/20,285.70
  6. Step 6: Final answer
    x = 9,366.89

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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.