Home / 13,621.72-18,806.58-8,913.96

Finding the Fourth Proportional to 13,621.72, 18,806.58 and 8,913.96

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Solution

The fourth proportional to 13,621.72, 18,806.58 and 8,913.96 is: 12,306.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.72 : 18,806.58 = 8,913.96 : x
  2. Step 2: Convert to fraction form
    13,621.72/18,806.58 = 8,913.96/x
  3. Step 3: Cross multiply
    13,621.72x = 18,806.58 × 8,913.96
  4. Step 4: Simplify right side
    13,621.72x = 167,641,101.86
  5. Step 5: Solve for x
    x = 167,641,101.86/13,621.72
  6. Step 6: Final answer
    x = 12,306.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.