Home / 20,656.31-30,907.92-12,340.85

Finding the Fourth Proportional to 20,656.31, 30,907.92 and 12,340.85

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Solution

The fourth proportional to 20,656.31, 30,907.92 and 12,340.85 is: 18,465.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.31 : 30,907.92 = 12,340.85 : x
  2. Step 2: Convert to fraction form
    20,656.31/30,907.92 = 12,340.85/x
  3. Step 3: Cross multiply
    20,656.31x = 30,907.92 × 12,340.85
  4. Step 4: Simplify right side
    20,656.31x = 381,430,004.53
  5. Step 5: Solve for x
    x = 381,430,004.53/20,656.31
  6. Step 6: Final answer
    x = 18,465.54

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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.