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Finding the Fourth Proportional to 13,487, 20,230.50 and 4,253

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Solution

The fourth proportional to 13,487, 20,230.50 and 4,253 is: 6,379.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487 : 20,230.50 = 4,253 : x
  2. Step 2: Convert to fraction form
    13,487/20,230.50 = 4,253/x
  3. Step 3: Cross multiply
    13,487x = 20,230.50 × 4,253
  4. Step 4: Simplify right side
    13,487x = 86,040,316.50
  5. Step 5: Solve for x
    x = 86,040,316.50/13,487
  6. Step 6: Final answer
    x = 6,379.50

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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.