Home / 13,929.12-20,880.36-5,161.68

Finding the Fourth Proportional to 13,929.12, 20,880.36 and 5,161.68

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Solution

The fourth proportional to 13,929.12, 20,880.36 and 5,161.68 is: 7,737.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.12 : 20,880.36 = 5,161.68 : x
  2. Step 2: Convert to fraction form
    13,929.12/20,880.36 = 5,161.68/x
  3. Step 3: Cross multiply
    13,929.12x = 20,880.36 × 5,161.68
  4. Step 4: Simplify right side
    13,929.12x = 107,777,736.60
  5. Step 5: Solve for x
    x = 107,777,736.60/13,929.12
  6. Step 6: Final answer
    x = 7,737.58

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1.5x scale

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.