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Finding the Fourth Proportional to 12,491.60, 18,737.40 and 6,270.80

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Solution

The fourth proportional to 12,491.60, 18,737.40 and 6,270.80 is: 9,406.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.60 : 18,737.40 = 6,270.80 : x
  2. Step 2: Convert to fraction form
    12,491.60/18,737.40 = 6,270.80/x
  3. Step 3: Cross multiply
    12,491.60x = 18,737.40 × 6,270.80
  4. Step 4: Simplify right side
    12,491.60x = 117,498,487.92
  5. Step 5: Solve for x
    x = 117,498,487.92/12,491.60
  6. Step 6: Final answer
    x = 9,406.20

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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.