Home / 20,491.31-30,741.82-6,451.35

Finding the Fourth Proportional to 20,491.31, 30,741.82 and 6,451.35

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Solution

The fourth proportional to 20,491.31, 30,741.82 and 6,451.35 is: 9,678.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.31 : 30,741.82 = 6,451.35 : x
  2. Step 2: Convert to fraction form
    20,491.31/30,741.82 = 6,451.35/x
  3. Step 3: Cross multiply
    20,491.31x = 30,741.82 × 6,451.35
  4. Step 4: Simplify right side
    20,491.31x = 198,326,109.05
  5. Step 5: Solve for x
    x = 198,326,109.05/20,491.31
  6. Step 6: Final answer
    x = 9,678.55

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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.