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Finding the Fourth Proportional to 18,616.92, 25,688.64 and 10,657.68

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Solution

The fourth proportional to 18,616.92, 25,688.64 and 10,657.68 is: 14,706.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.92 : 25,688.64 = 10,657.68 : x
  2. Step 2: Convert to fraction form
    18,616.92/25,688.64 = 10,657.68/x
  3. Step 3: Cross multiply
    18,616.92x = 25,688.64 × 10,657.68
  4. Step 4: Simplify right side
    18,616.92x = 273,781,304.76
  5. Step 5: Solve for x
    x = 273,781,304.76/18,616.92
  6. Step 6: Final answer
    x = 14,706.05

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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.