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Finding the Fourth Proportional to 20,487.48, 30,668.32 and 14,939.48

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Solution

The fourth proportional to 20,487.48, 30,668.32 and 14,939.48 is: 22,363.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.48 : 30,668.32 = 14,939.48 : x
  2. Step 2: Convert to fraction form
    20,487.48/30,668.32 = 14,939.48/x
  3. Step 3: Cross multiply
    20,487.48x = 30,668.32 × 14,939.48
  4. Step 4: Simplify right side
    20,487.48x = 458,168,753.27
  5. Step 5: Solve for x
    x = 458,168,753.27/20,487.48
  6. Step 6: Final answer
    x = 22,363.35

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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.