Home / 13,147.65-18,143.61-7,179.57

Finding the Fourth Proportional to 13,147.65, 18,143.61 and 7,179.57

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Solution

The fourth proportional to 13,147.65, 18,143.61 and 7,179.57 is: 9,907.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.65 : 18,143.61 = 7,179.57 : x
  2. Step 2: Convert to fraction form
    13,147.65/18,143.61 = 7,179.57/x
  3. Step 3: Cross multiply
    13,147.65x = 18,143.61 × 7,179.57
  4. Step 4: Simplify right side
    13,147.65x = 130,263,318.05
  5. Step 5: Solve for x
    x = 130,263,318.05/13,147.65
  6. Step 6: Final answer
    x = 9,907.73

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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.