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Finding the Fourth Proportional to 19,838.57, 27,378.44 and 13,112.53

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Solution

The fourth proportional to 19,838.57, 27,378.44 and 13,112.53 is: 18,096.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,838.57 : 27,378.44 = 13,112.53 : x
  2. Step 2: Convert to fraction form
    19,838.57/27,378.44 = 13,112.53/x
  3. Step 3: Cross multiply
    19,838.57x = 27,378.44 × 13,112.53
  4. Step 4: Simplify right side
    19,838.57x = 359,000,685.02
  5. Step 5: Solve for x
    x = 359,000,685.02/19,838.57
  6. Step 6: Final answer
    x = 18,096.10

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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.