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Finding the Fourth Proportional to 12,594.80, 17,380.59 and 8,615.78

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Solution

The fourth proportional to 12,594.80, 17,380.59 and 8,615.78 is: 11,889.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,594.80 : 17,380.59 = 8,615.78 : x
  2. Step 2: Convert to fraction form
    12,594.80/17,380.59 = 8,615.78/x
  3. Step 3: Cross multiply
    12,594.80x = 17,380.59 × 8,615.78
  4. Step 4: Simplify right side
    12,594.80x = 149,747,252.81
  5. Step 5: Solve for x
    x = 149,747,252.81/12,594.80
  6. Step 6: Final answer
    x = 11,889.61

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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.