Home / 13,620.54-20,420.43-7,042.53

Finding the Fourth Proportional to 13,620.54, 20,420.43 and 7,042.53

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Solution

The fourth proportional to 13,620.54, 20,420.43 and 7,042.53 is: 10,558.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.54 : 20,420.43 = 7,042.53 : x
  2. Step 2: Convert to fraction form
    13,620.54/20,420.43 = 7,042.53/x
  3. Step 3: Cross multiply
    13,620.54x = 20,420.43 × 7,042.53
  4. Step 4: Simplify right side
    13,620.54x = 143,811,490.89
  5. Step 5: Solve for x
    x = 143,811,490.89/13,620.54
  6. Step 6: Final answer
    x = 10,558.43

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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.