Home / 3,129.42-4,322.15-2,132.99

Finding the Fourth Proportional to 3,129.42, 4,322.15 and 2,132.99

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Solution

The fourth proportional to 3,129.42, 4,322.15 and 2,132.99 is: 2,945.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.42 : 4,322.15 = 2,132.99 : x
  2. Step 2: Convert to fraction form
    3,129.42/4,322.15 = 2,132.99/x
  3. Step 3: Cross multiply
    3,129.42x = 4,322.15 × 2,132.99
  4. Step 4: Simplify right side
    3,129.42x = 9,219,070.45
  5. Step 5: Solve for x
    x = 9,219,070.45/3,129.42
  6. Step 6: Final answer
    x = 2,945.94

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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.