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Finding the Fourth Proportional to 12,239.72, 16,890.92 and 6,650.72

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Solution

The fourth proportional to 12,239.72, 16,890.92 and 6,650.72 is: 9,178.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.72 : 16,890.92 = 6,650.72 : x
  2. Step 2: Convert to fraction form
    12,239.72/16,890.92 = 6,650.72/x
  3. Step 3: Cross multiply
    12,239.72x = 16,890.92 × 6,650.72
  4. Step 4: Simplify right side
    12,239.72x = 112,336,750.04
  5. Step 5: Solve for x
    x = 112,336,750.04/12,239.72
  6. Step 6: Final answer
    x = 9,178.05

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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.