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Finding the Fourth Proportional to 20,281.92, 30,348.87 and 11,965.92

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Solution

The fourth proportional to 20,281.92, 30,348.87 and 11,965.92 is: 17,905.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.92 : 30,348.87 = 11,965.92 : x
  2. Step 2: Convert to fraction form
    20,281.92/30,348.87 = 11,965.92/x
  3. Step 3: Cross multiply
    20,281.92x = 30,348.87 × 11,965.92
  4. Step 4: Simplify right side
    20,281.92x = 363,152,150.51
  5. Step 5: Solve for x
    x = 363,152,150.51/20,281.92
  6. Step 6: Final answer
    x = 17,905.22

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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.