Home / 5,429.58-8,138.90-2,141.40

Finding the Fourth Proportional to 5,429.58, 8,138.90 and 2,141.40

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Solution

The fourth proportional to 5,429.58, 8,138.90 and 2,141.40 is: 3,209.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,429.58 : 8,138.90 = 2,141.40 : x
  2. Step 2: Convert to fraction form
    5,429.58/8,138.90 = 2,141.40/x
  3. Step 3: Cross multiply
    5,429.58x = 8,138.90 × 2,141.40
  4. Step 4: Simplify right side
    5,429.58x = 17,428,640.46
  5. Step 5: Solve for x
    x = 17,428,640.46/5,429.58
  6. Step 6: Final answer
    x = 3,209.94

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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.