Home / 13,685.80-20,516.55-4,918.36

Finding the Fourth Proportional to 13,685.80, 20,516.55 and 4,918.36

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Solution

The fourth proportional to 13,685.80, 20,516.55 and 4,918.36 is: 7,373.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.80 : 20,516.55 = 4,918.36 : x
  2. Step 2: Convert to fraction form
    13,685.80/20,516.55 = 4,918.36/x
  3. Step 3: Cross multiply
    13,685.80x = 20,516.55 × 4,918.36
  4. Step 4: Simplify right side
    13,685.80x = 100,907,778.86
  5. Step 5: Solve for x
    x = 100,907,778.86/13,685.80
  6. Step 6: Final answer
    x = 7,373.17

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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.