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Finding the Fourth Proportional to 18,903.70, 28,367.70 and 11,006.20

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Solution

The fourth proportional to 18,903.70, 28,367.70 and 11,006.20 is: 16,516.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.70 : 28,367.70 = 11,006.20 : x
  2. Step 2: Convert to fraction form
    18,903.70/28,367.70 = 11,006.20/x
  3. Step 3: Cross multiply
    18,903.70x = 28,367.70 × 11,006.20
  4. Step 4: Simplify right side
    18,903.70x = 312,220,579.74
  5. Step 5: Solve for x
    x = 312,220,579.74/18,903.70
  6. Step 6: Final answer
    x = 16,516.37

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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.