Home / 12,829.80-19,212.30-8,423.40

Finding the Fourth Proportional to 12,829.80, 19,212.30 and 8,423.40

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Solution

The fourth proportional to 12,829.80, 19,212.30 and 8,423.40 is: 12,613.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,829.80 : 19,212.30 = 8,423.40 : x
  2. Step 2: Convert to fraction form
    12,829.80/19,212.30 = 8,423.40/x
  3. Step 3: Cross multiply
    12,829.80x = 19,212.30 × 8,423.40
  4. Step 4: Simplify right side
    12,829.80x = 161,832,887.82
  5. Step 5: Solve for x
    x = 161,832,887.82/12,829.80
  6. Step 6: Final answer
    x = 12,613.83

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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.