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Finding the Fourth Proportional to 19,615.43, 29,420.04 and 8,519.15

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Solution

The fourth proportional to 19,615.43, 29,420.04 and 8,519.15 is: 12,777.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,615.43 : 29,420.04 = 8,519.15 : x
  2. Step 2: Convert to fraction form
    19,615.43/29,420.04 = 8,519.15/x
  3. Step 3: Cross multiply
    19,615.43x = 29,420.04 × 8,519.15
  4. Step 4: Simplify right side
    19,615.43x = 250,633,586.67
  5. Step 5: Solve for x
    x = 250,633,586.67/19,615.43
  6. Step 6: Final answer
    x = 12,777.37

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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.