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Finding the Fourth Proportional to 8,458.92, 12,689.73 and 2,910.90

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Solution

The fourth proportional to 8,458.92, 12,689.73 and 2,910.90 is: 4,366.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.92 : 12,689.73 = 2,910.90 : x
  2. Step 2: Convert to fraction form
    8,458.92/12,689.73 = 2,910.90/x
  3. Step 3: Cross multiply
    8,458.92x = 12,689.73 × 2,910.90
  4. Step 4: Simplify right side
    8,458.92x = 36,938,535.06
  5. Step 5: Solve for x
    x = 36,938,535.06/8,458.92
  6. Step 6: Final answer
    x = 4,366.81

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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.