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Finding the Fourth Proportional to 13,862, 19,129.97 and 7,574.78

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Solution

The fourth proportional to 13,862, 19,129.97 and 7,574.78 is: 10,453.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,862 : 19,129.97 = 7,574.78 : x
  2. Step 2: Convert to fraction form
    13,862/19,129.97 = 7,574.78/x
  3. Step 3: Cross multiply
    13,862x = 19,129.97 × 7,574.78
  4. Step 4: Simplify right side
    13,862x = 144,905,314.16
  5. Step 5: Solve for x
    x = 144,905,314.16/13,862
  6. Step 6: Final answer
    x = 10,453.42

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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.