Home / 8,425.24-12,639.36-2,879.20

Finding the Fourth Proportional to 8,425.24, 12,639.36 and 2,879.20

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Solution

The fourth proportional to 8,425.24, 12,639.36 and 2,879.20 is: 4,319.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,425.24 : 12,639.36 = 2,879.20 : x
  2. Step 2: Convert to fraction form
    8,425.24/12,639.36 = 2,879.20/x
  3. Step 3: Cross multiply
    8,425.24x = 12,639.36 × 2,879.20
  4. Step 4: Simplify right side
    8,425.24x = 36,391,245.31
  5. Step 5: Solve for x
    x = 36,391,245.31/8,425.24
  6. Step 6: Final answer
    x = 4,319.31

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1.5x scale

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.