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Finding the Fourth Proportional to 20,636.66, 30,954.80 and 5,054.30

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Solution

The fourth proportional to 20,636.66, 30,954.80 and 5,054.30 is: 7,581.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.66 : 30,954.80 = 5,054.30 : x
  2. Step 2: Convert to fraction form
    20,636.66/30,954.80 = 5,054.30/x
  3. Step 3: Cross multiply
    20,636.66x = 30,954.80 × 5,054.30
  4. Step 4: Simplify right side
    20,636.66x = 156,454,845.64
  5. Step 5: Solve for x
    x = 156,454,845.64/20,636.66
  6. Step 6: Final answer
    x = 7,581.40

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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.