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Finding the Fourth Proportional to 13,119.53, 18,104.40 and 7,151.06

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Solution

The fourth proportional to 13,119.53, 18,104.40 and 7,151.06 is: 9,868.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.53 : 18,104.40 = 7,151.06 : x
  2. Step 2: Convert to fraction form
    13,119.53/18,104.40 = 7,151.06/x
  3. Step 3: Cross multiply
    13,119.53x = 18,104.40 × 7,151.06
  4. Step 4: Simplify right side
    13,119.53x = 129,465,695.93
  5. Step 5: Solve for x
    x = 129,465,695.93/13,119.53
  6. Step 6: Final answer
    x = 9,868.17

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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.