Home / 12,834.90-17,716.05-8,120.70

Finding the Fourth Proportional to 12,834.90, 17,716.05 and 8,120.70

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Solution

The fourth proportional to 12,834.90, 17,716.05 and 8,120.70 is: 11,209.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,834.90 : 17,716.05 = 8,120.70 : x
  2. Step 2: Convert to fraction form
    12,834.90/17,716.05 = 8,120.70/x
  3. Step 3: Cross multiply
    12,834.90x = 17,716.05 × 8,120.70
  4. Step 4: Simplify right side
    12,834.90x = 143,866,727.24
  5. Step 5: Solve for x
    x = 143,866,727.24/12,834.90
  6. Step 6: Final answer
    x = 11,209.03

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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.