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Finding the Fourth Proportional to 18,491.40, 27,737.10 and 7,399.80

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Solution

The fourth proportional to 18,491.40, 27,737.10 and 7,399.80 is: 11,099.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.40 : 27,737.10 = 7,399.80 : x
  2. Step 2: Convert to fraction form
    18,491.40/27,737.10 = 7,399.80/x
  3. Step 3: Cross multiply
    18,491.40x = 27,737.10 × 7,399.80
  4. Step 4: Simplify right side
    18,491.40x = 205,248,992.58
  5. Step 5: Solve for x
    x = 205,248,992.58/18,491.40
  6. Step 6: Final answer
    x = 11,099.70

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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.