Home / 14,137.44-21,180.72-7,890

Finding the Fourth Proportional to 14,137.44, 21,180.72 and 7,890

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Solution

The fourth proportional to 14,137.44, 21,180.72 and 7,890 is: 11,820.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,137.44 : 21,180.72 = 7,890 : x
  2. Step 2: Convert to fraction form
    14,137.44/21,180.72 = 7,890/x
  3. Step 3: Cross multiply
    14,137.44x = 21,180.72 × 7,890
  4. Step 4: Simplify right side
    14,137.44x = 167,115,880.80
  5. Step 5: Solve for x
    x = 167,115,880.80/14,137.44
  6. Step 6: Final answer
    x = 11,820.80

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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.