Home / 13,555.62-20,340.32-9,163.40

Finding the Fourth Proportional to 13,555.62, 20,340.32 and 9,163.40

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Solution

The fourth proportional to 13,555.62, 20,340.32 and 9,163.40 is: 13,749.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.62 : 20,340.32 = 9,163.40 : x
  2. Step 2: Convert to fraction form
    13,555.62/20,340.32 = 9,163.40/x
  3. Step 3: Cross multiply
    13,555.62x = 20,340.32 × 9,163.40
  4. Step 4: Simplify right side
    13,555.62x = 186,386,340.77
  5. Step 5: Solve for x
    x = 186,386,340.77/13,555.62
  6. Step 6: Final answer
    x = 13,749.75

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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.