Home / 8,276.60-12,403.38-6,429.80

Finding the Fourth Proportional to 8,276.60, 12,403.38 and 6,429.80

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Solution

The fourth proportional to 8,276.60, 12,403.38 and 6,429.80 is: 9,635.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,276.60 : 12,403.38 = 6,429.80 : x
  2. Step 2: Convert to fraction form
    8,276.60/12,403.38 = 6,429.80/x
  3. Step 3: Cross multiply
    8,276.60x = 12,403.38 × 6,429.80
  4. Step 4: Simplify right side
    8,276.60x = 79,751,252.72
  5. Step 5: Solve for x
    x = 79,751,252.72/8,276.60
  6. Step 6: Final answer
    x = 9,635.75

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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.