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Finding the Fourth Proportional to 20,310.56, 30,470.64 and 6,459.56

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Solution

The fourth proportional to 20,310.56, 30,470.64 and 6,459.56 is: 9,690.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.56 : 30,470.64 = 6,459.56 : x
  2. Step 2: Convert to fraction form
    20,310.56/30,470.64 = 6,459.56/x
  3. Step 3: Cross multiply
    20,310.56x = 30,470.64 × 6,459.56
  4. Step 4: Simplify right side
    20,310.56x = 196,826,927.32
  5. Step 5: Solve for x
    x = 196,826,927.32/20,310.56
  6. Step 6: Final answer
    x = 9,690.87

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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.