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Finding the Fourth Proportional to 20,470.70, 30,706.07 and 5,679.63

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Solution

The fourth proportional to 20,470.70, 30,706.07 and 5,679.63 is: 8,519.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.70 : 30,706.07 = 5,679.63 : x
  2. Step 2: Convert to fraction form
    20,470.70/30,706.07 = 5,679.63/x
  3. Step 3: Cross multiply
    20,470.70x = 30,706.07 × 5,679.63
  4. Step 4: Simplify right side
    20,470.70x = 174,399,087.96
  5. Step 5: Solve for x
    x = 174,399,087.96/20,470.70
  6. Step 6: Final answer
    x = 8,519.45

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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.