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Finding the Fourth Proportional to 12,608.91, 18,913.38 and 4,289.82

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Solution

The fourth proportional to 12,608.91, 18,913.38 and 4,289.82 is: 6,434.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.91 : 18,913.38 = 4,289.82 : x
  2. Step 2: Convert to fraction form
    12,608.91/18,913.38 = 4,289.82/x
  3. Step 3: Cross multiply
    12,608.91x = 18,913.38 × 4,289.82
  4. Step 4: Simplify right side
    12,608.91x = 81,134,995.79
  5. Step 5: Solve for x
    x = 81,134,995.79/12,608.91
  6. Step 6: Final answer
    x = 6,434.74

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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.