Home / 13,147.80-18,143.82-7,179.45

Finding the Fourth Proportional to 13,147.80, 18,143.82 and 7,179.45

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Solution

The fourth proportional to 13,147.80, 18,143.82 and 7,179.45 is: 9,907.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.80 : 18,143.82 = 7,179.45 : x
  2. Step 2: Convert to fraction form
    13,147.80/18,143.82 = 7,179.45/x
  3. Step 3: Cross multiply
    13,147.80x = 18,143.82 × 7,179.45
  4. Step 4: Simplify right side
    13,147.80x = 130,262,648.50
  5. Step 5: Solve for x
    x = 130,262,648.50/13,147.80
  6. Step 6: Final answer
    x = 9,907.56

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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.