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Finding the Fourth Proportional to 19,234.70, 28,855.95 and 10,918.70

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Solution

The fourth proportional to 19,234.70, 28,855.95 and 10,918.70 is: 16,380.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,234.70 : 28,855.95 = 10,918.70 : x
  2. Step 2: Convert to fraction form
    19,234.70/28,855.95 = 10,918.70/x
  3. Step 3: Cross multiply
    19,234.70x = 28,855.95 × 10,918.70
  4. Step 4: Simplify right side
    19,234.70x = 315,069,461.27
  5. Step 5: Solve for x
    x = 315,069,461.27/19,234.70
  6. Step 6: Final answer
    x = 16,380.26

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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.