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Finding the Fourth Proportional to 12,886.35, 17,784.81 and 7,581.66

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Solution

The fourth proportional to 12,886.35, 17,784.81 and 7,581.66 is: 10,463.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886.35 : 17,784.81 = 7,581.66 : x
  2. Step 2: Convert to fraction form
    12,886.35/17,784.81 = 7,581.66/x
  3. Step 3: Cross multiply
    12,886.35x = 17,784.81 × 7,581.66
  4. Step 4: Simplify right side
    12,886.35x = 134,838,382.58
  5. Step 5: Solve for x
    x = 134,838,382.58/12,886.35
  6. Step 6: Final answer
    x = 10,463.66

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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.