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Finding the Fourth Proportional to 18,755.35, 28,082.90 and 9,971.51

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Solution

The fourth proportional to 18,755.35, 28,082.90 and 9,971.51 is: 14,930.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.35 : 28,082.90 = 9,971.51 : x
  2. Step 2: Convert to fraction form
    18,755.35/28,082.90 = 9,971.51/x
  3. Step 3: Cross multiply
    18,755.35x = 28,082.90 × 9,971.51
  4. Step 4: Simplify right side
    18,755.35x = 280,028,802.69
  5. Step 5: Solve for x
    x = 280,028,802.69/18,755.35
  6. Step 6: Final answer
    x = 14,930.61

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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.