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Finding the Fourth Proportional to 19,229.70, 28,845.90 and 10,913.70

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Solution

The fourth proportional to 19,229.70, 28,845.90 and 10,913.70 is: 16,371.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,229.70 : 28,845.90 = 10,913.70 : x
  2. Step 2: Convert to fraction form
    19,229.70/28,845.90 = 10,913.70/x
  3. Step 3: Cross multiply
    19,229.70x = 28,845.90 × 10,913.70
  4. Step 4: Simplify right side
    19,229.70x = 314,815,498.83
  5. Step 5: Solve for x
    x = 314,815,498.83/19,229.70
  6. Step 6: Final answer
    x = 16,371.32

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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.