Home / 13,558.77-20,345.85-7,318.71

Finding the Fourth Proportional to 13,558.77, 20,345.85 and 7,318.71

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Solution

The fourth proportional to 13,558.77, 20,345.85 and 7,318.71 is: 10,982.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,558.77 : 20,345.85 = 7,318.71 : x
  2. Step 2: Convert to fraction form
    13,558.77/20,345.85 = 7,318.71/x
  3. Step 3: Cross multiply
    13,558.77x = 20,345.85 × 7,318.71
  4. Step 4: Simplify right side
    13,558.77x = 148,905,375.85
  5. Step 5: Solve for x
    x = 148,905,375.85/13,558.77
  6. Step 6: Final answer
    x = 10,982.22

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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.