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Finding the Fourth Proportional to 13,998.29, 20,990.15 and 5,225.99

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Solution

The fourth proportional to 13,998.29, 20,990.15 and 5,225.99 is: 7,836.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.29 : 20,990.15 = 5,225.99 : x
  2. Step 2: Convert to fraction form
    13,998.29/20,990.15 = 5,225.99/x
  3. Step 3: Cross multiply
    13,998.29x = 20,990.15 × 5,225.99
  4. Step 4: Simplify right side
    13,998.29x = 109,694,287.87
  5. Step 5: Solve for x
    x = 109,694,287.87/13,998.29
  6. Step 6: Final answer
    x = 7,836.26

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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.