Home / 5,145.66-7,718.40-2,679.12

Finding the Fourth Proportional to 5,145.66, 7,718.40 and 2,679.12

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Solution

The fourth proportional to 5,145.66, 7,718.40 and 2,679.12 is: 4,018.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.66 : 7,718.40 = 2,679.12 : x
  2. Step 2: Convert to fraction form
    5,145.66/7,718.40 = 2,679.12/x
  3. Step 3: Cross multiply
    5,145.66x = 7,718.40 × 2,679.12
  4. Step 4: Simplify right side
    5,145.66x = 20,678,519.81
  5. Step 5: Solve for x
    x = 20,678,519.81/5,145.66
  6. Step 6: Final answer
    x = 4,018.63

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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.