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Finding the Fourth Proportional to 8,639.39, 12,934.49 and 7,950.49

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Solution

The fourth proportional to 8,639.39, 12,934.49 and 7,950.49 is: 11,903.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.39 : 12,934.49 = 7,950.49 : x
  2. Step 2: Convert to fraction form
    8,639.39/12,934.49 = 7,950.49/x
  3. Step 3: Cross multiply
    8,639.39x = 12,934.49 × 7,950.49
  4. Step 4: Simplify right side
    8,639.39x = 102,835,461.31
  5. Step 5: Solve for x
    x = 102,835,461.31/8,639.39
  6. Step 6: Final answer
    x = 11,903.09

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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.