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Finding the Fourth Proportional to 19,168.90, 28,760.48 and 8,635.76

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Solution

The fourth proportional to 19,168.90, 28,760.48 and 8,635.76 is: 12,956.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,168.90 : 28,760.48 = 8,635.76 : x
  2. Step 2: Convert to fraction form
    19,168.90/28,760.48 = 8,635.76/x
  3. Step 3: Cross multiply
    19,168.90x = 28,760.48 × 8,635.76
  4. Step 4: Simplify right side
    19,168.90x = 248,368,480.55
  5. Step 5: Solve for x
    x = 248,368,480.55/19,168.90
  6. Step 6: Final answer
    x = 12,956.85

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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.