Home / 12,812.28-19,191.40-8,129.82

Finding the Fourth Proportional to 12,812.28, 19,191.40 and 8,129.82

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Solution

The fourth proportional to 12,812.28, 19,191.40 and 8,129.82 is: 12,177.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.28 : 19,191.40 = 8,129.82 : x
  2. Step 2: Convert to fraction form
    12,812.28/19,191.40 = 8,129.82/x
  3. Step 3: Cross multiply
    12,812.28x = 19,191.40 × 8,129.82
  4. Step 4: Simplify right side
    12,812.28x = 156,022,571.24
  5. Step 5: Solve for x
    x = 156,022,571.24/12,812.28
  6. Step 6: Final answer
    x = 12,177.58

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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.