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Finding the Fourth Proportional to 20,914.29, 31,343.73 and 9,801.09

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Solution

The fourth proportional to 20,914.29, 31,343.73 and 9,801.09 is: 14,688.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.29 : 31,343.73 = 9,801.09 : x
  2. Step 2: Convert to fraction form
    20,914.29/31,343.73 = 9,801.09/x
  3. Step 3: Cross multiply
    20,914.29x = 31,343.73 × 9,801.09
  4. Step 4: Simplify right side
    20,914.29x = 307,202,718.67
  5. Step 5: Solve for x
    x = 307,202,718.67/20,914.29
  6. Step 6: Final answer
    x = 14,688.65

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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.