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Finding the Fourth Proportional to 12,718.41, 17,551.35 and 7,129.41

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Solution

The fourth proportional to 12,718.41, 17,551.35 and 7,129.41 is: 9,838.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,718.41 : 17,551.35 = 7,129.41 : x
  2. Step 2: Convert to fraction form
    12,718.41/17,551.35 = 7,129.41/x
  3. Step 3: Cross multiply
    12,718.41x = 17,551.35 × 7,129.41
  4. Step 4: Simplify right side
    12,718.41x = 125,130,770.20
  5. Step 5: Solve for x
    x = 125,130,770.20/12,718.41
  6. Step 6: Final answer
    x = 9,838.55

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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.