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Finding the Fourth Proportional to 8,419, 12,618.86 and 4,722.92

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Solution

The fourth proportional to 8,419, 12,618.86 and 4,722.92 is: 7,078.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419 : 12,618.86 = 4,722.92 : x
  2. Step 2: Convert to fraction form
    8,419/12,618.86 = 4,722.92/x
  3. Step 3: Cross multiply
    8,419x = 12,618.86 × 4,722.92
  4. Step 4: Simplify right side
    8,419x = 59,597,866.27
  5. Step 5: Solve for x
    x = 59,597,866.27/8,419
  6. Step 6: Final answer
    x = 7,078.97

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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.