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Finding the Fourth Proportional to 33,992.87, 51,021.72 and 20,870.87

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Solution

The fourth proportional to 33,992.87, 51,021.72 and 20,870.87 is: 31,326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,992.87 : 51,021.72 = 20,870.87 : x
  2. Step 2: Convert to fraction form
    33,992.87/51,021.72 = 20,870.87/x
  3. Step 3: Cross multiply
    33,992.87x = 51,021.72 × 20,870.87
  4. Step 4: Simplify right side
    33,992.87x = 1,064,867,430.19
  5. Step 5: Solve for x
    x = 1,064,867,430.19/33,992.87
  6. Step 6: Final answer
    x = 31,326.20

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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.