Home / 7,145.30-9,860.81-4,160.65

Finding the Fourth Proportional to 7,145.30, 9,860.81 and 4,160.65

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Solution

The fourth proportional to 7,145.30, 9,860.81 and 4,160.65 is: 5,741.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.30 : 9,860.81 = 4,160.65 : x
  2. Step 2: Convert to fraction form
    7,145.30/9,860.81 = 4,160.65/x
  3. Step 3: Cross multiply
    7,145.30x = 9,860.81 × 4,160.65
  4. Step 4: Simplify right side
    7,145.30x = 41,027,387.27
  5. Step 5: Solve for x
    x = 41,027,387.27/7,145.30
  6. Step 6: Final answer
    x = 5,741.87

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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.