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Finding the Fourth Proportional to 13,039.68, 17,990.28 and 7,373.76

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Solution

The fourth proportional to 13,039.68, 17,990.28 and 7,373.76 is: 10,173.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,039.68 : 17,990.28 = 7,373.76 : x
  2. Step 2: Convert to fraction form
    13,039.68/17,990.28 = 7,373.76/x
  3. Step 3: Cross multiply
    13,039.68x = 17,990.28 × 7,373.76
  4. Step 4: Simplify right side
    13,039.68x = 132,656,007.05
  5. Step 5: Solve for x
    x = 132,656,007.05/13,039.68
  6. Step 6: Final answer
    x = 10,173.26

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.