Home / 7,820.31-11,731.43-2,555.85

Finding the Fourth Proportional to 7,820.31, 11,731.43 and 2,555.85

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Solution

The fourth proportional to 7,820.31, 11,731.43 and 2,555.85 is: 3,834.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,820.31 : 11,731.43 = 2,555.85 : x
  2. Step 2: Convert to fraction form
    7,820.31/11,731.43 = 2,555.85/x
  3. Step 3: Cross multiply
    7,820.31x = 11,731.43 × 2,555.85
  4. Step 4: Simplify right side
    7,820.31x = 29,983,762.59
  5. Step 5: Solve for x
    x = 29,983,762.59/7,820.31
  6. Step 6: Final answer
    x = 3,834.09

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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.