Home / 5,143.12-7,712.94-1,679.56

Finding the Fourth Proportional to 5,143.12, 7,712.94 and 1,679.56

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Solution

The fourth proportional to 5,143.12, 7,712.94 and 1,679.56 is: 2,518.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,143.12 : 7,712.94 = 1,679.56 : x
  2. Step 2: Convert to fraction form
    5,143.12/7,712.94 = 1,679.56/x
  3. Step 3: Cross multiply
    5,143.12x = 7,712.94 × 1,679.56
  4. Step 4: Simplify right side
    5,143.12x = 12,954,345.51
  5. Step 5: Solve for x
    x = 12,954,345.51/5,143.12
  6. Step 6: Final answer
    x = 2,518.77

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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.