Home / 8,291.80-12,429.30-4,125.40

Finding the Fourth Proportional to 8,291.80, 12,429.30 and 4,125.40

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Solution

The fourth proportional to 8,291.80, 12,429.30 and 4,125.40 is: 6,183.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,291.80 : 12,429.30 = 4,125.40 : x
  2. Step 2: Convert to fraction form
    8,291.80/12,429.30 = 4,125.40/x
  3. Step 3: Cross multiply
    8,291.80x = 12,429.30 × 4,125.40
  4. Step 4: Simplify right side
    8,291.80x = 51,275,834.22
  5. Step 5: Solve for x
    x = 51,275,834.22/8,291.80
  6. Step 6: Final answer
    x = 6,183.92

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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.