Home / 5,145.40-7,718.10-3,505.15

Finding the Fourth Proportional to 5,145.40, 7,718.10 and 3,505.15

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Solution

The fourth proportional to 5,145.40, 7,718.10 and 3,505.15 is: 5,257.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.40 : 7,718.10 = 3,505.15 : x
  2. Step 2: Convert to fraction form
    5,145.40/7,718.10 = 3,505.15/x
  3. Step 3: Cross multiply
    5,145.40x = 7,718.10 × 3,505.15
  4. Step 4: Simplify right side
    5,145.40x = 27,053,098.22
  5. Step 5: Solve for x
    x = 27,053,098.22/5,145.40
  6. Step 6: Final answer
    x = 5,257.73

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1.5x scale

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.