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Finding the Fourth Proportional to 12,400.70, 18,601.05 and 4,607.90

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Solution

The fourth proportional to 12,400.70, 18,601.05 and 4,607.90 is: 6,911.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,400.70 : 18,601.05 = 4,607.90 : x
  2. Step 2: Convert to fraction form
    12,400.70/18,601.05 = 4,607.90/x
  3. Step 3: Cross multiply
    12,400.70x = 18,601.05 × 4,607.90
  4. Step 4: Simplify right side
    12,400.70x = 85,711,778.30
  5. Step 5: Solve for x
    x = 85,711,778.30/12,400.70
  6. Step 6: Final answer
    x = 6,911.85

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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.