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Finding the Fourth Proportional to 20,319.58, 30,479.91 and 7,168.96

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Solution

The fourth proportional to 20,319.58, 30,479.91 and 7,168.96 is: 10,753.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.58 : 30,479.91 = 7,168.96 : x
  2. Step 2: Convert to fraction form
    20,319.58/30,479.91 = 7,168.96/x
  3. Step 3: Cross multiply
    20,319.58x = 30,479.91 × 7,168.96
  4. Step 4: Simplify right side
    20,319.58x = 218,509,255.59
  5. Step 5: Solve for x
    x = 218,509,255.59/20,319.58
  6. Step 6: Final answer
    x = 10,753.63

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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.