Home / 13,147.90-18,144.20-7,179.59

Finding the Fourth Proportional to 13,147.90, 18,144.20 and 7,179.59

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Solution

The fourth proportional to 13,147.90, 18,144.20 and 7,179.59 is: 9,907.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.90 : 18,144.20 = 7,179.59 : x
  2. Step 2: Convert to fraction form
    13,147.90/18,144.20 = 7,179.59/x
  3. Step 3: Cross multiply
    13,147.90x = 18,144.20 × 7,179.59
  4. Step 4: Simplify right side
    13,147.90x = 130,267,916.88
  5. Step 5: Solve for x
    x = 130,267,916.88/13,147.90
  6. Step 6: Final answer
    x = 9,907.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.