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Finding the Fourth Proportional to 8,639.48, 11,922.50 and 4,913.48

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Solution

The fourth proportional to 8,639.48, 11,922.50 and 4,913.48 is: 6,780.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.48 : 11,922.50 = 4,913.48 : x
  2. Step 2: Convert to fraction form
    8,639.48/11,922.50 = 4,913.48/x
  3. Step 3: Cross multiply
    8,639.48x = 11,922.50 × 4,913.48
  4. Step 4: Simplify right side
    8,639.48x = 58,580,965.30
  5. Step 5: Solve for x
    x = 58,580,965.30/8,639.48
  6. Step 6: Final answer
    x = 6,780.61

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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.