Home / 12,639.30-17,451.48-8,165.70

Finding the Fourth Proportional to 12,639.30, 17,451.48 and 8,165.70

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Solution

The fourth proportional to 12,639.30, 17,451.48 and 8,165.70 is: 11,274.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.30 : 17,451.48 = 8,165.70 : x
  2. Step 2: Convert to fraction form
    12,639.30/17,451.48 = 8,165.70/x
  3. Step 3: Cross multiply
    12,639.30x = 17,451.48 × 8,165.70
  4. Step 4: Simplify right side
    12,639.30x = 142,503,550.24
  5. Step 5: Solve for x
    x = 142,503,550.24/12,639.30
  6. Step 6: Final answer
    x = 11,274.64

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1.5x scale

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.