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Finding the Fourth Proportional to 19,021.50, 28,545.21 and 6,709.50

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Solution

The fourth proportional to 19,021.50, 28,545.21 and 6,709.50 is: 10,068.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,021.50 : 28,545.21 = 6,709.50 : x
  2. Step 2: Convert to fraction form
    19,021.50/28,545.21 = 6,709.50/x
  3. Step 3: Cross multiply
    19,021.50x = 28,545.21 × 6,709.50
  4. Step 4: Simplify right side
    19,021.50x = 191,524,086.50
  5. Step 5: Solve for x
    x = 191,524,086.50/19,021.50
  6. Step 6: Final answer
    x = 10,068.82

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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.