Home / 21,278.56-31,907.94-6,489.04

Finding the Fourth Proportional to 21,278.56, 31,907.94 and 6,489.04

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Solution

The fourth proportional to 21,278.56, 31,907.94 and 6,489.04 is: 9,730.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.56 : 31,907.94 = 6,489.04 : x
  2. Step 2: Convert to fraction form
    21,278.56/31,907.94 = 6,489.04/x
  3. Step 3: Cross multiply
    21,278.56x = 31,907.94 × 6,489.04
  4. Step 4: Simplify right side
    21,278.56x = 207,051,898.98
  5. Step 5: Solve for x
    x = 207,051,898.98/21,278.56
  6. Step 6: Final answer
    x = 9,730.54

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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.