Home / 12,890.28-17,782.26-8,411.96

Finding the Fourth Proportional to 12,890.28, 17,782.26 and 8,411.96

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Solution

The fourth proportional to 12,890.28, 17,782.26 and 8,411.96 is: 11,604.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.28 : 17,782.26 = 8,411.96 : x
  2. Step 2: Convert to fraction form
    12,890.28/17,782.26 = 8,411.96/x
  3. Step 3: Cross multiply
    12,890.28x = 17,782.26 × 8,411.96
  4. Step 4: Simplify right side
    12,890.28x = 149,583,659.83
  5. Step 5: Solve for x
    x = 149,583,659.83/12,890.28
  6. Step 6: Final answer
    x = 11,604.38

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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.