Home / 3,129.24-4,317.12-2,184.78

Finding the Fourth Proportional to 3,129.24, 4,317.12 and 2,184.78

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Solution

The fourth proportional to 3,129.24, 4,317.12 and 2,184.78 is: 3,014.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.24 : 4,317.12 = 2,184.78 : x
  2. Step 2: Convert to fraction form
    3,129.24/4,317.12 = 2,184.78/x
  3. Step 3: Cross multiply
    3,129.24x = 4,317.12 × 2,184.78
  4. Step 4: Simplify right side
    3,129.24x = 9,431,957.43
  5. Step 5: Solve for x
    x = 9,431,957.43/3,129.24
  6. Step 6: Final answer
    x = 3,014.14

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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.