Home / 13,685.09-20,515.32-4,913.87

Finding the Fourth Proportional to 13,685.09, 20,515.32 and 4,913.87

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Solution

The fourth proportional to 13,685.09, 20,515.32 and 4,913.87 is: 7,366.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.09 : 20,515.32 = 4,913.87 : x
  2. Step 2: Convert to fraction form
    13,685.09/20,515.32 = 4,913.87/x
  3. Step 3: Cross multiply
    13,685.09x = 20,515.32 × 4,913.87
  4. Step 4: Simplify right side
    13,685.09x = 100,809,512.91
  5. Step 5: Solve for x
    x = 100,809,512.91/13,685.09
  6. Step 6: Final answer
    x = 7,366.38

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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.