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Finding the Fourth Proportional to 20,495.70, 30,731.94 and 8,001.45

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Solution

The fourth proportional to 20,495.70, 30,731.94 and 8,001.45 is: 11,997.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,495.70 : 30,731.94 = 8,001.45 : x
  2. Step 2: Convert to fraction form
    20,495.70/30,731.94 = 8,001.45/x
  3. Step 3: Cross multiply
    20,495.70x = 30,731.94 × 8,001.45
  4. Step 4: Simplify right side
    20,495.70x = 245,900,081.31
  5. Step 5: Solve for x
    x = 245,900,081.31/20,495.70
  6. Step 6: Final answer
    x = 11,997.64

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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.