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Finding the Fourth Proportional to 9,145.39, 12,619.98 and 5,368.71

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Solution

The fourth proportional to 9,145.39, 12,619.98 and 5,368.71 is: 7,408.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,145.39 : 12,619.98 = 5,368.71 : x
  2. Step 2: Convert to fraction form
    9,145.39/12,619.98 = 5,368.71/x
  3. Step 3: Cross multiply
    9,145.39x = 12,619.98 × 5,368.71
  4. Step 4: Simplify right side
    9,145.39x = 67,752,965.50
  5. Step 5: Solve for x
    x = 67,752,965.50/9,145.39
  6. Step 6: Final answer
    x = 7,408.43

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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.