Home / 13,929.18-20,880-5,161.74

Finding the Fourth Proportional to 13,929.18, 20,880 and 5,161.74

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Solution

The fourth proportional to 13,929.18, 20,880 and 5,161.74 is: 7,737.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.18 : 20,880 = 5,161.74 : x
  2. Step 2: Convert to fraction form
    13,929.18/20,880 = 5,161.74/x
  3. Step 3: Cross multiply
    13,929.18x = 20,880 × 5,161.74
  4. Step 4: Simplify right side
    13,929.18x = 107,777,131.20
  5. Step 5: Solve for x
    x = 107,777,131.20/13,929.18
  6. Step 6: Final answer
    x = 7,737.51

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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.