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Finding the Fourth Proportional to 13,781.76, 19,017.84 and 7,494

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Solution

The fourth proportional to 13,781.76, 19,017.84 and 7,494 is: 10,341.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.76 : 19,017.84 = 7,494 : x
  2. Step 2: Convert to fraction form
    13,781.76/19,017.84 = 7,494/x
  3. Step 3: Cross multiply
    13,781.76x = 19,017.84 × 7,494
  4. Step 4: Simplify right side
    13,781.76x = 142,519,692.96
  5. Step 5: Solve for x
    x = 142,519,692.96/13,781.76
  6. Step 6: Final answer
    x = 10,341.18

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Why These Related Problems?

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