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Finding the Fourth Proportional to 13,781.88, 19,018.98 and 7,494.21

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Solution

The fourth proportional to 13,781.88, 19,018.98 and 7,494.21 is: 10,342.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.88 : 19,018.98 = 7,494.21 : x
  2. Step 2: Convert to fraction form
    13,781.88/19,018.98 = 7,494.21/x
  3. Step 3: Cross multiply
    13,781.88x = 19,018.98 × 7,494.21
  4. Step 4: Simplify right side
    13,781.88x = 142,532,230.11
  5. Step 5: Solve for x
    x = 142,532,230.11/13,781.88
  6. Step 6: Final answer
    x = 10,342.00

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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.