Home / 3,139-4,329.28-2,143.24

Finding the Fourth Proportional to 3,139, 4,329.28 and 2,143.24

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Solution

The fourth proportional to 3,139, 4,329.28 and 2,143.24 is: 2,955.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139 : 4,329.28 = 2,143.24 : x
  2. Step 2: Convert to fraction form
    3,139/4,329.28 = 2,143.24/x
  3. Step 3: Cross multiply
    3,139x = 4,329.28 × 2,143.24
  4. Step 4: Simplify right side
    3,139x = 9,278,686.07
  5. Step 5: Solve for x
    x = 9,278,686.07/3,139
  6. Step 6: Final answer
    x = 2,955.94

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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.