Home / 13,620.76-20,440.55-8,943.01

Finding the Fourth Proportional to 13,620.76, 20,440.55 and 8,943.01

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Solution

The fourth proportional to 13,620.76, 20,440.55 and 8,943.01 is: 13,420.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.76 : 20,440.55 = 8,943.01 : x
  2. Step 2: Convert to fraction form
    13,620.76/20,440.55 = 8,943.01/x
  3. Step 3: Cross multiply
    13,620.76x = 20,440.55 × 8,943.01
  4. Step 4: Simplify right side
    13,620.76x = 182,800,014.31
  5. Step 5: Solve for x
    x = 182,800,014.31/13,620.76
  6. Step 6: Final answer
    x = 13,420.69

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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.