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Finding the Fourth Proportional to 8,601.90, 12,901.08 and 3,920.58

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Solution

The fourth proportional to 8,601.90, 12,901.08 and 3,920.58 is: 5,880.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,601.90 : 12,901.08 = 3,920.58 : x
  2. Step 2: Convert to fraction form
    8,601.90/12,901.08 = 3,920.58/x
  3. Step 3: Cross multiply
    8,601.90x = 12,901.08 × 3,920.58
  4. Step 4: Simplify right side
    8,601.90x = 50,579,716.23
  5. Step 5: Solve for x
    x = 50,579,716.23/8,601.90
  6. Step 6: Final answer
    x = 5,880.06

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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.